Carrizo Springs Has Been the County Seat Since 1880

Dimmit County was formed in 1858 from parts of Bexar, Webb, Maverick, and Uvalde counties. The county is named for Philip Dimmitt. He helped write the Goliad Declaration of Independence. The county name dropped one 't' from his surname. The area stayed mostly empty until after the Civil War. Conflict with Native American groups and outlaws kept settlers away.

Carrizo Springs was founded in 1865. A group led by Levi English started it. They had come from Atascosa County. The county was formally organized in 1880. Carrizo Springs was the largest settlement at the time, so it became the county seat. The railroad arrived in 1910. The town incorporated that same year. By 1915, about 1,200 people lived there. Today it is still the county seat and the center of county government.