Texas State Highway 276

State Highway 276 (SH 276) is a Texas state highway that runs from Rockwall east to Emory. This route was designated on July 25, 1960, between Rockwall and Quinlan, replacing FM 1143 and part of FM 35. SH 276 was extended to its current terminus on October 25, 1990, replacing most of FM 35.

History
SH 276 was designated on September 7, 1938, as a route between US 285 southeast of Arno and Mentone. On April 16, 1946, another section from SH 115 to what was then SH 82 (now SH 18) in Kermit was added. On August 12, 1946, that section was transferred to SH 302. On December 1, 1953, SH 276 was transferred to SH 302.

In early 2021, construction began near Quinlan to eliminate the SH 276/SH 34 concurrency by rerouting SH 276 along the south side of Quinlan from its intersection with SH 34 and reconnecting with the existing SH 276 west of the city. On February 27, 2023, the new route of 276 was officially opened, while the existing 276 that ran from FM 36 to Downtown Quinlan was shut down to be reconstructed into Bus. SH 276-D. On April 29, 2023, the intersection of SH 276 and Bus. SH 276-D was opened up to traffic.

Business route
In 2023, SH 276 officially designated one business route, which is 1.8 mi long. The business route is the former SH 276 that begins at the west side of town and passes through Downtown Quinlan before terminating at SH 34 on the north side. In 2024, the business route was labeled as Bus. SH 276-D.