List of Farm to Market Roads in Texas (500–599)

in Texas are owned and maintained by the Texas Department of Transportation.

FM 500

Farm to Market Road 500 is located in San Saba County. It runs from SH 16 north of San Saba to FM 45 north of Richland Springs.
FM 500 was designated on July 13, 1945, from SH 16 northwestward to Fairview. It was extended northwest twice: a extension on November 23, 1948, and a extension on September 29, 1954. On September 28, 1955, it was extended to the west to FM 45, replacing FM 1479.

RM 501

Ranch to Market Road 501 is located in Mason and San Saba counties. Its western terminus is at SH 71 in Pontotoc. It travels to the north before turning to the east toward Cherokee, where it crosses SH 16. It then travels eastward and then northeastward before reaching its eastern terminus at FM 580 southwest of Bend, for a total length of.
RM 501 was authorized on July 13, 1945, as Farm to Market Road 501, a road between SH 16 in Cherokee and the Salt Branch Road in San Saba County. On November 29, 1957, FM 501 was extended west to Pontotoc, replacing FM 1648; at this time, the designation was changed from FM 501 to RM 501. On October 31, 1958, RM 501 was extended eastward. On September 27, 1960, it was extended to its junction with FM 580.

FM 502

Farm to Market Road 502 is located in McCulloch and San Saba counties.
FM 502 was designated on July 14, 1945, from US 377 southeast and east via Mercury to the Milburn Road. On August 24, 1954, FM 502 was extended east to the McCulloch–San Saba county line. On September 23, 1954, the route was extended southeast to FM 45, replacing FM 2048.

FM 503

Farm to Market Road 503 is located in McCulloch and Coleman counties. It runs from US 87 northwest of Melvin to a point north of SH 153 northwest of Coleman.
FM 503 was designated on July 14, 1945, from a point on US 87 northwest of Melvin, northward miles to Salt Gap. On November 23, 1948, the FM 503 designation was extended miles to the north, to Doole. On November 21, 1956, the route was extended northward to Stacy. On September 27, 1960, the road was extended north to US 67, replacing FM 566. On May 6, 1964, FM 503 was extended north to FM 53. On May 7, 1974, FM 503 was extended north to its current terminus.

FM 504

Farm to Market Road 504 is located in McCulloch County.
FM 504 was designated on July 14, 1945, from US 283 west and south through Lohn to a point east of Pear Valley. On July 21, 1949, FM 504 was extended west. On May 23, 1951, FM 504 was extended west through Pear Valley to a road intersection. On November 20, 1951, FM 504 was extended west. On December 17, 1952, FM 504 was extended west miles to FM 503.

RM 505

Ranch to Market Road 505 lies entirely within Jeff Davis County in the Trans-Pecos region of far West Texas. Intended to provide a link between the county's only two incorporated areas, Valentine and Fort Davis, RM 505 begins at a junction with US 90 south of Valentine and travels about east to an intersection with SH 166 approximately west of Fort Davis.
RM 505 was designated on July 19, 1945 on the current route, as Farm to Market Road 505. The designation was changed to RM 505 on October 27, 1959.

FM 506

Farm to Market Road 506 is located in Willacy and Cameron counties. It runs from US 281 in Bluetown to Bus. US 77 in Sebastian, and also serves the towns of La Feria, where the highway intersects I-2/US 83, and Santa Rosa, where it runs concurrent with SH 107.
FM 506 was designated on July 3, 1945, from Santa Rosa to a point north. On November 23, 1948, the road was extended to US 77 in Sebastian. On October 26, 1954, a section from SH 107 in Santa Rosa to US 281 was added, creating a concurrency with SH 107.
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FM 507

Farm to Market Road 507 is located in Cameron and Willacy counties. It runs from Bus. US 77 to FM 498.
FM 507 was designated on July 3, 1945, from FM 106 northeast of Harlingen north to the Combes/Rio Hondo Road. On July 12, 1949, the road was extended north and east to a road intersection. On December 29, 1949, the road was extended east, but this section was reassigned to FM 1599 on June 18, 1950. On February 6, 1953, a break was added at FM 508. On October 31, 1957, the road was extended north to FM 1018. On August 28, 1958, the northern terminus was moved to FM 498, forming a continuous route with FM 2374; FM 508 was extended over FM 2374 on September 12, 1958, replacing it. On July 1, 1959, the road was extended south over former FM 106 to US 77. On June 27, 1995, the section from FM 508 to Bus. US 77 was transferred to Urban Road 507 The designation reverted to FM 507 with the elimination of the Urban Road system on November 15, 2018.

FM 508

Farm to Market Road 508 is located in Cameron County. It runs from I-69E/US 77 at Combes to FM 106 west of Rio Hondo.
FM 508 was designated on July 3, 1945, from a point east of Combes to FM 106 west of Rio Hondo. On December 17, 1952, the road was extended west to US 77, creating a concurrency with FM 507. This concurrency was removed on February 6, 1953, when this section was transferred to FM 508. On May 21, 1979, a section from Loop 448 to US 77 was transferred to SH 107.

FM 509

Farm to Market Road 509 is located in Cameron County. It runs from FM 508 to the Los Indios Texas Port of Entry near the Free Trade International Bridge along the Mexican border.
FM 509 was designated on July 3, 1945, from US 83 south of Harlingen to Rangerville and southeast to Sam Houston Boulevard, but the route was corrected to end at FM 675. On April 26, 1989, the road was extended south to the GSA complex at the Los Indios International Bridge, although this section was not officially designated until April 5, 1992, replacing FM 3380. On December 21, 1994, the road was extended north to FM 508, replacing Loop 590 and creating a concurrency with FM 1595. On June 27, 1995, the section from FM 1595 to US 77 was transferred to Urban Road 509. On November 20, 2014, the road was extended east to a then-proposed Border State Inspection Facility. The designation of the section previously transferred to UR 509 reverted to FM 509 with the elimination of the Urban Road system on November 15, 2018.

FM 510

Farm to Market Road 510 is located in Cameron County. It runs from Bus. US 77 and FM 732 in San Benito to SH 100 near Laguna Vista.
FM 510 was designated on July 3, 1945, from SH 100 near Laguna Vista to Abney. On October 26, 1954, the road was extended to US 83 southeast of San Benito, replacing a section of FM 732. On December 16, 2004, the section from Bus. US 77 to Iowa Gardens Road was transferred to FM 732.

FM 511

Farm to Market Road 511 is located in Cameron County. It runs from FM 3248 on the northeast side of Brownsville southeast and southward to the city's southern sections. The highway forms an outer loop/bypass of the main portion of Brownsville. It is known locally and is signed as the Senator Eddie Lucio Jr. Highway.
FM 511 was originally designated on July 3, 1945, from US 83 in Olmito to SH 4 near the Port of Brownsville. On September 9, 1947, it was extended on the north side to include a section to US 281 near Olmito, and on the south side to extend southward and westward into Brownsville. On November 23, 1948, it was extended to SH 4 in Brownsville. On October 7, 1949, the section south of FM 1419 was transferred to FM 1419. On January 29, 1957, this section west of Olmito was renumbered FM 1732. On August 26, 1969, FM 511 was relocated at Port of Brownsville.
The highway formerly extended northwest to I-69E and US 77/US 83 at Olmito, but this portion was expanded starting in 2008 and was transferred to SH 550. The section from FM 3248 south to SH 48 was a part of this expansion, becoming a four-lane highway with center turning lane. This project began in January 2008 and was completed late in 2010.
On June 27, 1995, the section from FM 3248 to FM 1419 was designated Urban Road 511. The designation reverted to FM 511 with the elimination of the Urban Road system on November 15, 2018.

FM 512

Farm to Market Road 512 is located in Hunt County. It runs from FM 2874 west of Commerce to SH 34 in Wolfe City.
FM 512 was designated on June 25, 1945, from SH 24, west of Commerce, to Aberfoyle. On November 30, 1949, the road was extended northwest to SH 34 in Wolfe City.

FM 513

Farm to Market Road 513 is located in Hunt and Rains counties. It runs from SH 50 to SH 276.
FM 513 was designated on June 25, 1945, from SH 24 in Commerce via Campbell to US 69 in Lone Oak. On November 23, 1948, FM 513 was extended south to a road intersection. On December 15, 1954, FM 513 was extended south to FM 35, replacing FM 1974. On August 28, 1958, the section from old SH 24 to old SH 11 Alt. was transferred to Spur 178. On May 1, 1965, the section from FM 819 to Spur 178 was transferred to the new SH 50, as well as FM 819 itself.

FM 514

Farm to Market Road 514 is located in Rains and Wood counties. It runs from US 69 in Point to FM 17. The route has overlaps with FM 275 in Dougherty and SH 19 in Freedom. A spur connection, FM Spur 514, connects to Lake Fork Reservoir.
FM 514 was designated on June 11, 1945, from Point to a point south. On July 14, 1949, the road was extended northeast to Wattsville. It was extended northeast to FM 275 and south to Flats on May 23, 1951. On November 27, 1953, a section was transferred to FM 47. On December 21, 1959, the road was extended to FM 17, replacing a section of FM 275 and all of FM 1767, creating concurrencies with FM 275 and SH 19. A portion of what was previously FM 1767 was once FM 2089. The spur connection was added on October 6, 1980; this was formerly a portion of FM 17 before it was rerouted due to construction of the reservoir.