The 1st Texas Cavalry Regiment was a cavalry regiment from Texas that served in the Union Army during the American Civil War. This regiment, composed of eight companies, was organized at New Orleans, Louisiana from November 6, 1862, to February 26, 1864, to serve three years. It served in the Department of the Gulf and in Texas. It was increased to twelve companies on September 10, 1864, by the consolidation of the 2nd Texas Cavalry Regiment. Afterwards, it continued to serve until it was mustered out of service November 4, 1865, in accordance with orders from the War Department.