The route was designated on December 22, 1936 from Port Lavaca to Inez. On September 26, 1939, it was extended to Seadrift, replacing a portion of SH 27.
The route was identified on December 22, 1936 from Port Lavaca to Inez. On September 26, 1939, it was expanded to Seadrift, replacing a part of SH 27.