Farm to Market Road 303 (
FM 303) is a route in the
South Plains region. FM 303 runs from
US 180 between
Seminole and
Lamesa to
FM 145 in southwest
Castro County. FM 303 begins at an intersection with
US 180 in southeastern
Gaines County. The highway runs north to
Loop where it intersects with
SH 83. FM 303 continues traveling north and enters into
Terry County. The highway begins an overlap with
FM 213 about south of
Wellman. The two highways run through the town together, with FM 303 leaving that overlap and beginning an overlap with
US 62/
US 385. About northeast of Wellman, FM 303 leaves its overlap with US 62/82 and travels to the north. The highway turns to the west at County Road 941 before turning back to the north at
FM 402. FM 303 turns back to the west at
FM 211 and turns back to the north at County Road 937 and enters
Hockley County about north of here. In southern Hockley County, FM 303 runs through the town of
Sundown where it intersects with
FM 301. Approximately north of Sundown, the highway has a brief overlap with
FM 300. The next major intersection is at
SH 114, where FM 303 has another overlap. The highway runs through rural areas of Hockley and
Lamb counties before entering the town of
Sudan, where it meets
US 84. FM 303 continues to run through rural areas before entering
Castro County, where it ends at an intersection with
FM 145. FM 303 was designated on June 11, 1945, from US 84 in Sudan southward miles to
Beck. On January 27, 1948, FM 303 was extended south to
FM 54. On February 25, 1949, FM 303 was extended north to US 70. On May 23, 1951, FM 303 was extended north to the Lamb–Castro county line. On January 29, 1954, FM 303 was extended north and east to a road intersection at
Dodd. On December 31, 1954, FM 303 was extended south to
SH 290 (changed to
SH 116 on March 31, 1955, and to part of
SH 114 on December 14, 1977), replacing
FM 2129. On February 10, 1966, FM 303 was extended south to US 180, replacing all of
FM 1635, a section of
FM 1634 (current concurrency with FM 300; all of FM 1634 replaced by rerouted FM 300), a section of
FM 300, and all of
FM 1312. On May 12, 1989, FM 303 was rerouted north over FM 3458 to FM 145, while the section from west of Dodd to Dodd was renumbered as the new
FM 3458, effectively causing the routes to swap places. ;Junction list {{TXint|type=concur {{TXint|type=concur {{TXint|type=concur {{TXint|type=concur {{TXint|type=concur {{TXint|type=concur {{TXint|type=concur {{TXint|type=concur {{TXint|type=concur {{TXint|type=concur {{TXint|type=concur {{TXint|type=concur {{TXint|type=concur ==FM 304==