Geronimo is an unincorporated community and census-designated place (CDP) in Guadalupe County, Texas, United States.

In 1831 during the Mexican Texas period, James Bowie surveyed eleven leagues of land within the colony of Green DeWitt.

Located on the northeast bank of the Guadalupe River, the area surrounded the natural springs called "Tio Geronimo".

The community had grown into a small town by 1891, sporting a general store, a post office (former bank), a steam-powered cotton gin, and a population of twenty.

[9] Geronimo is located in northern Guadalupe County along Texas State Highway 123, which leads north 15 miles (24 km) to San Marcos and south 6 miles (10 km) to Seguin, the Guadalupe County seat.

According to the United States Census Bureau, the Geronimo CDP has a total area of 8.1 square miles (21.1 km2), all land.

Geronimo has turned into a day-trip destination for travelers from the Hill Country, Austin, San Antonio and the Valley.

Geronimo is famed for its annual BBQ & Chili Cook-Offs and VFW raffle and auction.