Farm to Market Road 1604 (or FM 1604) was designated on November 7, 1980 on its current route as a renumbering of the FM 308 spur connection in Irene. The road was not signed until very recently, as parts of the old FM 1604 in San Antonio may have still been signed.
FM 1604 was first designated on January 30, 1951. The highway ran north from FM 1153 near Seymour northward 1 mile to a point in Baylor County. On January 14, 1957, FM 1604 was cancelled with the mileage being transferred to RM 1919.
FM 1604 was designated again on November 20, 1956, running east from US 87 (now concurrent with I-10) to US 281 at a distance of approximately 8.2 miles (13.2 km). On December 19, 1958, FM 1604 was extended 13.5 miles (21.7 km) to US 90. On August 7, 1959, the highway was extended another 22.0 miles (35.4 km) when it absorbed Loop 334 from US 87 to FM 2173 (now Macdona Lacoste Road) in Macdona. FM 1604 was extended to the San Antonio River on May 3, 1963. On August 23, 1964, FM 1627 (which went from I-35 to SH 218) became part of FM 1604 because the sections from US 281 to I-35 and from SH 218 to US 90 opened. The highway was extended from the San Antonio River to I-10 east of San Antonio on May 7, 1969, completing the loop around San Antonio at a distance of approximately 93.4 miles (150.3 km). On August 23, 1973, the section of FM 1518 from SH 16 to FM 2173 was redesignated and officially signed as FM 1604. On September 4, 1973, most of FM 2173, which went from Kinney Road south of Macdona to FM 1518, was redesignated and officially signed as FM 1604. The rest of FM 2173 was given to the city of Somerset. On June 30, 1977, FM 1604 was cancelled and re-designated as Loop 1604 as the section from US 90 south to FM 1518 opened, creating a full loop, replacing the section of FM 1518 from SH 16 to the current junction with Loop 1604.
The second use of the FM 1605 designation was in Scurry County on July 28, 1955, running from SH 350 to US 84 (now Bus. US 84). FM 1605 was cancelled on September 1, 1958, as the county could not secure right of way.
FM 1605 was designated a third time on October 31, 1958. The highway ran from US 83 to the Taylor-Jones county line. FM 1605 was cancelled on October 2, 1959 and redesignated as FM 2404, as the above FM 1605 (cancelled on September 1, 1958) had right of way secured (right of way had not been secured earlier, but it was secured).
Farm to Market Road 1607 (or FM 1607) is located entirely in Scurry County.
FM 1607 begins at an intersection with FM 1606 west of Snyder. The highway runs east and has an overlap with FM 1609 and intersects FM 1611 before entering Snyder. FM 1607 runs along 37th Street to El Paso Avenue. FM 1607 runs on El Paso Avenue before ending at an intersection with US 180.
FM 1607 was designated on June 21, 1951, running from US 180 in Snyder westward to what is now FM 1611. The highway was extended further west to FM 1609 on October 29, 1953. On September 1, 1954, FM 1607 extended west to FM 1606, absorbing FM 1608 in the process.
RM 1608 was designated on October 31, 1958 from FM 471, 1 mile west of the Bexar County line, west 7.3 miles to a road intersection. RM 1608 was cancelled on May 21, 1970 and transferred to FM 1283.
The original FM 1617 was designated on May 23, 1951 from FM 316 at Payne Springs west and north to FM 85 & FM 1250. FM 1617was cancelled on October 3, 1961 and transferred to FM 90, which also replaced the portion of SH 85 north of FM 1250.
The original FM 1618 was designated on May 23, 1951 from Loop 46 at Post northeast 5 miles to a road intersection 0.7 mile north of Yellow House Fork of the Brazos River. On November 20, 1951 the road was extended northeast 2.5 miles. FM 1618 was cancelled on February 24, 1953 and transferred to FM 651.
Farm to Market Road 1623 (FM 1623) was first designated in Blanco County on May 23, 1951, and ran from US 281 in Blanco to the west approximately 5.0 mi (8.0 km). Its length was extended to 10.3 mi on October 28, 1953 and increased again to 13.6 miles on September 29, 1954; the designation ended at the Gillespie County line. The extension into Gillespie County and to US 290 was approved on August 24, 1955. The route was redesignated on November 26, 1969 as an RM route, the same day the extension to RM 2721 was added.
RM 1623 begins in eastern Gillespie County at an intersection with RM 2721. It travels to the south into Stonewall, where it crosses Ranch Road 1, and has a one-block eastward concurrency with US 290 before continuing southward. It then turns to the southeast and crosses into Blanco County. The route intersects RM 1888 before turning to the east and running along the north bank of the Blanco River into Blanco. The RM 1623 designation ends at US 281 in central Blanco; the roadway continues as Loop 163.
The route was redesignated on November 26, 1969 from an FM route to an RM route.
Farm to Market Road 1624 (or FM 1624) is located entirely in Lee County.
FM 1624 was designated on May 23, 1951, from SH 21 south of Lincoln northwestward 6.5 miles toward Fedor to the south end of the Yegua Creek Bridge. On November 20, 1951, FM 1624 extended northwest 1.9 miles to Fedor School. On May 21, 1953, FM 1624 was extended eastward from SH 21 to US 77. On June 28, 1963, FM 1624 extended east to Loop 123 & FM 696 in Lexington.
FM 1625 was originally assigned on May 23, 1951 to a road segment between FM 1327 in Creedmoor and the then-current alignment of State Highway 29 in mid-1951. This segment was then combined with FM 1327 on November 20, 1951. The new alignment was assigned on November 20, 1951; the section south of FM 1327 was originally part of FM 1327.
In Fall 2013, construction contractor SEMA Construction began work on expanding the old two-lane road to a four-lane road with a center turn lane. Construction on the road is expected to be completed Fall 2014.
FM 1626 was designated on May 23, 1951 from U.S. Highway 81 (US 81; now I‑35) west 2.7 miles (4.3 km) to Manchaca. On May 6, 1964, FM 1626 was extended to RM 967. On October 26, 1983, FM 1626 was extended to FM 2770. On May 24, 2007, FM 1626 was extended south to I‑35, completing its current route.
Farm to Market Road 1627 (or FM 1627) is a former highway that was entirely located in Bexar County. No highway currently uses the FM 1627 designation.
FM 1627 was designated on May 23, 1951, running from US 81 (now I-35) near Selma to SH 218 at a distance of 0.4 miles (0.64 km). The highway was cancelled on August 13, 1964, with the mileage being transferred to FM 1604 (now Loop 1604).
The original FM 1629 was designated on May 23, 1951 from FM 1203 at Callisburg east and north 5 miles to a road intersection 1 mile south of Sturgeon. FM 1629 was cancelled on February 6, 1953 and transferred to FM 1203 (now FM 678).
Farm to Market Road 1630 (FM 1630) is a two-lane, state-maintained highway. It connects the farming community of Hardy, near Forestburg in Montague County to FM 51 3 miles (4.8 km) south of Gainesville in Cooke County. FM 1630 terminates at FM 677 at its western end and at FM 51 at its eastern end.
FM 1630 was designated on May 23, 1951 from FM 51 southwest 4.1 miles (6.6 km) to a road intersection. On November 20 of that year, FM 1630 was extended southwest 3.8 miles (6.1 km) to another road intersection. On August 24, 1955, FM 1630 was extended west to FM 677.
The original FM 1632 was designated on May 23, 1951 from SH 290 (now SH 116) at Smyer south 10 miles to a county road. On March 31, 1955 the road was extended south 2.4 miles to FM 41. FM 1632 was cancelled on January 13, 1960 and transferred to FM 168.
The original FM 1634 was designated on May 23, 1951 from FM 300, 2.5 miles south of SH 290 (now SH 116), west 7.1 miles to the Cochran County line. Four months later the road was extended west 0.4 mile to FM 769. FM 1634 was cancelled on February 10, 1966 and became a portion of FM 300.
The original FM 1635 was designated on May 23, 1951 from SH 290 (now SH 116), 6.2 miles west of Levelland south 2.5 miles to then-proposed FM 1634. FM 1635 was cancelled on December 10, 1966 and became a portion of FM 303. FM 1634 was also cancelled that day and became a portion of FM 300.
The original FM 1636 was designated on May 23, 1951 from US 81, 2 miles north of Waco to northwest 11 miles to Cholson. This was corrected to 12.3 miles six months later. FM 1636 was cancelled on October 18, 1954 and became a portion of FM 1244 (now FM 933; FM 1244 was reassigned to the old route of FM 933).
FM 1637 begins at an intersection with FM 56 north of Valley Mills and runs parallel in close proximity to the North Bosque River from here to FM 185 (North River Crossing Road) in Waco. In Waco, the highway is known as China Spring Road from FM 185 to FM 3051, running near Lake Waco and along the northern boundary of Waco Regional Airport before turning in a more southward direction. At FM 3051, FM 1637 is known as 19th Street and crosses over the Bosque River and runs through less developed areas of Waco before ending at Lake Shore Drive. 
FM 1637 was designated on May 23, 1951, running northwest from US 84 to the community of Earth. On October 26, 1954, the highway was extended 4.5 miles (7.2 km) to a road intersection north of China Spring. On June 1, 1965, FM 1637 was extended another 6.2 miles (10.0 km), absorbing FM 2704. On September 30, 1970, the highway was relocated around China Spring, adding a loop through that town. On June 27, 1995, the section of FM 185 to US 84 was transferred to Urban Road 1637. On April 2, 2017, the section from Lake Shore Drive to US 84 was given to the city of Waco. This section is now 19th Street, 18th Street, Lyle Avenue/Herring Avenue, and 4th Street/5th Street.
FM 1639 was designated on May 23, 1951 from SH 135 in Overton to SH 31. On December 20, 1963, the highway was extended northeast over the old location of SH 31. On February 1, 1964, FM 1639 was rerouted to end at FM 850. On November 31, 1972, the section south of FM 3053 was transferred to FM 3053.
FM 1640 begins at Spur 529 on the western edge of Rosenberg and follows Avenue I east for most of its length. From Spur 529 to the traffic light at State Highway 36 (SH 36) or First Street is 0.7 miles (1.1 km). From SH 36 to the slight jog at Millie Street is 1.0 mile (1.6 km). From Millie Street to the traffic signal at Reading Road is 1.1 miles (1.8 km). This stretch of Avenue I passes the administration building for the Lamar Consolidated Independent School District and Traylor Stadium's south grandstand. From Reading Road to the intersection with FM 2218 is 0.7 miles (1.1 km). In the last 200 yards (183 m) before the intersection, FM 1640 changes direction from east to northeast. In this area, there are several businesses including a Valero filling station and a Walmart on the south side of the highway and a Wharton County Junior College campus on the north side. After going 0.3 miles (0.5 km) to the northeast, FM 1640 crosses Union Pacific Railroad tracks and ends at a traffic light at FM 762 in front of the George Memorial Library. The continuation of the road to the northeast is called Golfview Drive.
FM 1640 was originally authorized on May 23, 1951, to run from FM 762 in Richmond west to Jeanetta Street in Rosenberg, which was a distance of 2.2 miles (3.5 km). On January 1, 1966, the highway was extended an additional 1.7 miles (2.7 km) along Avenue I to U.S. Route 59. The connection to US 59 was 0.25 miles (0.40 km) west of the US 59 intersection with SH 36. The old route along Millie Street from Avenue I to US 59 became a spur connection. A 1955 USGS map showed that US 59 shared its right-of-way with U.S. Route 90 Alternate (US 90A), which still passes through downtown Richmond and Rosenberg. US 59 split off from US 90A on the west side of Rosenberg in 1955 and headed southwest. By the time the 1971 USGS map was published, US 59 bypassed Rosenberg to the south and Spur 529 used the former right-of-way of US 59 west of Rosenberg. On April 3, 2006, the spur connection to US 90A at Millie Street was removed from the state highway system.[nb 4] In 2017, FM 1640 and US 90A were converted to a one-way pair in Rosenberg.
Farm to Market Road 1641 (FM 1641) is located in Kaufman County. It is known locally as Talty Road, and travels in a northeast direction from Talty to Forney, totaling 5.348 miles (8.607 km).
FM 1641 begins at an intersection with FM 148 in Talty with southbound traffic on FM 1641 continuing straight at the intersection traveling on northbound FM 148. The highway travels through the town before meeting Interstate 20 near the geographic center of Talty. FM 1641 leaves the city limits of Talty and passes by a subdivision before arriving at a signaled–controlled intersection with Helms Trail. The highway enters the city limits of Forney and passes by Henderson Elementary before ending at an intersection with FM 548 just south of U.S. Route 80.
FM 1641 was designated on May 23, 1951, from US 80 to FM 148 in Talty. On January 18, 1960, the section from FM 740 Spur to US 80 was transferred to the new FM 688, as well as FM 740 Spur itself.
FM 1650 was designated along its current routing on May 23, 1951, from SH 154 to SH 26. SH 26 would be canceled in its entirety and be replaced by US 259 when that route was commissioned on December 12, 1962.
Farm to Market Road 1654 was a designation applied to a highway in Van Zandt County. There is currently no highway using the FM 1654 designation.
FM 1654 was designated on May 23, 1951 from SH 198 south of Canton to SH 64 southeast of Canton, and was signed (but not designated) as part of SH 243 upon completion. FM 1654 was cancelled on August 29, 1990, as FM 1654 was officially designated as an extension of SH 243.
Farm to Market Road 1655 (FM 1655) is a two-lane, state-maintained highway connecting various farming areas of Wise and Montague County counties. It runs from U.S. Highway 380 (US 380), near Bridgeport, to FM 455, near Forestburg. Towns served by FM 1655 include Bridgeport, Alvord, and Chico in Wise County and Forestburg in Montague County.
FM 1655 was designated on May 23, 1951 from US 81 in Alvord to a county road 0.5 miles (0.80 km) south of the Wise–Montague county Line. On February 6, 1953, FM 1655 extended south and west to SH 24/SH 114 (now SH 101) in Chico, replacing FM 1881. On September 27, 1960, FM 1655 extended northeast to FM 455. On August 29, 1961, SH 24 and SH 114 were relocated in Chico, causing FM 1655 to lose 0.2 miles (0.32 km). On Match 27, 1963, the section of FM 1655 from FM 1810 to SH 24/SH 114 was transferred to FM 1810, and the section of FM 1810 from what was then FM 2403 to SH 24 (now US 380) was transferred to FM 1655.
Farm to Market Road 1659 was a designation applied to a highway in Llano County. There is currently no highway using the FM 1659 designation.
FM 1659 was designated on May 23, 1951 from FM 386 (later FM 734, later RM 734, now SH 71) east and south via Valley Spring to FM 386. FM 1659 was cancelled on October 29, 2004 and returned to Llano County.
Farm to Market Road 1660 (FM 1660) is located in Williamson County. It runs about 19.3 miles (31.1 km) from Jonah southeastward to a point near Coupland. When the road was created on May 23, 1951, it ran from Hutto southeast 5.5 miles to Norman's Crossing. On September 29, 1954, the road was extended to join with FM 973 at Rice's Crossing. On December 13, 1956, the portion of FM 973 that ran toward Coupland was redesignated as FM 1660, but signage did not change until the travel map was published. On June 28, 1963, the road was extended north from Hutto to Jonah.
Farm to Market Road 1663 is located in Chambers County. It runs from SH 61 at Hankamer to SH 73/SH 124 at Winnie.
FM 1663 was designated on August 15, 1955 from the north end of FM 1724, 3 miles east of Hankamer, east 3.2 miles to a road intersection. On November 21, 1956 the road was extended east and south 4.3 miles. On October 31, 1957 the road was extended south to SH 73-T (now SH 65) and west to SH 61 at Hankamer. On May 5, 1966 the section from FM 1410 south 5 miles to SH 73-T was transferred to FM 1410 while FM 1663 was rerouted east to IH 10/Spur 5 at Winnie, replacing FM 2990. On August 4, 1988 the road was extended to SH 73/SH 124 at Winnie, replacing Spur 5.
The original FM 1684 was designated on May 23, 1951 from FM 1019 southeast of Bigwells southeast to FM 468 northwest of Cotulla. On July 31, 1952 the road was rerouted over a section of former FM 468 to Woodward (the former section of FM 1684 became part of FM 468). FM 1684 was cancelled on November 16, 1953 and transferred to FM 469.
FM 1687 was designated on May 23, 1951 from SH 21 in Bryan to SH OSR. On November 24, 1959, FM 1687 extended west 1.8 miles to a road intersection. On September 27, 1960, FM 1687 extended west to FM 50. On June 27, 1995, the section from FM 2818 to SH 21 became an urban road.
Farm to Market Road 1688 (FM 1688), known locally as Leonard Road, is located entirely in Brazos County, running from SH 47 northeastward to FM 2818 in Bryan.
FM 1688 was designated on May 23, 1951 from Loop 158 (now FM 158) southwest 4.8 miles to a road intersection. On February 26, 1986, FM 1688 extended to FM 60. On December 14, 1989, the section from FM 158 to FM 2818 was given to the city of Bryan. On October 28, 1992, the section from SH 47 to FM 60 was transferred to SH 47 (which the route had been decided to follow the proposed route of FM 1688) and FM 1179 (this section of FM 1179 was changed to be built as a county road (Jones Road) on October 26, 1995). On June 27, 1995, FM 1688 became an urban road.
FM 1689 was designated on May 23, 1951 from US 283 (now US 183) in May eastward 3.6 miles to a road intersection at the Comanche county line. On October 28, 1953, FM 1689 extended east to FM 589 at Sidney, replacing a section of FM 589. On November 21, 1956, FM 1689 extended southeast 0.6 miles (0.97 km) to a road intersection. On September 27, 1960, FM 1689 extended southeast to SH 36, replacing FM 2634 from SH 36 west 5.7 miles (9.2 km).
The original FM 1694 was designated on May 23, 1951 from SH 200 (now US 90A) west and south to near Calhoun. FM 1694 was cancelled on February 24, 1953 and eliminated from the highway system; FM 1694 was to be transferred to FM 1597, but FM 1597 was extended on a new route instead. FM 1597 was cancelled and combined with FM 1093 on September 29, 1954.
Farm to Market Road 1695 is located in McLennan County. It runs from US 84 west of Waco to IH 35. The highway is locally known as Hewitt Drive for its entire length.
FM 1695 begins at I-35/FM 3148 in Hewitt. The highway travels in a northwest direction before turning in a slight northeast direction at an interchange with FM 2113 (Spring Valley Road). FM 1695 travels near the town square and turns back to the northwest at FM 2063 (Sun Valley Boulevard). The highway enters Woodway before ending at US 84.
FM 1695 was designated on October 31, 1958 from US 84, 1.5 miles west of Waco, south via Hewitt to FM 2113. On June 30, 1995 the entire route was transferred to Urban Road 1695. On September 25, 2008, by district request, the road was extended to IH 35.
The original FM 1695 was designated on May 23, 1951 from FM 488 west 5 miles to Saint Elmo. On August 20, 1952 the road was extended 1.6 miles west to Winkler. FM 1695 was cancelled on November 22, 1954 and combined with FM 246.