Cat Spring is an unincorporated community in southern Austin County, Texas, United States.

[2] Cat Spring was founded by immigrants from Oldenburg and Westphalia that was led by Ludwig Anton Siegmund von Roeder and Robert J. Kleberg in 1834, in which many of them were attracted to the area and the state by letters sent from Friedrich Ernst after he bought a plot of land in the Mill Creek Valley in 1831 and named for a nearby spring near the San Bernard River where a puma was killed by one of the German immigrants.

It was the site of a station on the Missouri-Kansas-Texas Railroad that linked it to New Ulm to the west and Sealy to the east, established in the 1890s.

[4] Although Cat Spring is unincorporated, it has a post office, with the ZIP code of 78933.

[5] Cat Spring lies along FM 949 and 2187 on the Missouri-Kansas-Texas Railroad and the west bank of the San Bernard River in western Austin County,[3] 10 mi (16 km) south of the city of Bellville, the county seat.