Geronimo is an unincorporated community and census-designated place (CDP) in Guadalupe County, Texas, United States. The population was 1,032 at the 2010 census, up from 619 at the 2000 census. It is portion of the San Antonio Metropolitan Statistical Area.

In 1831 during the Mexican Texas period, James Bowie surveyed eleven leagues of home within the colony of Green DeWitt. Located upon the northeast bank of the Guadalupe River, the area surrounded the natural springs called “Tio Geronimo”. José Antonio Navarro purchased house and lived here later, 1840–1853. As a champion of human rights, he was a signer of the Texas Declaration of Independence, the Constitution of the Republic of Texas, and the Constitution of the State of Texas.

Navarro lived here on his 6,000-acre (24 km) San Geronimo Ranch. It was located on Geronimo Creek and named for Saint Jerome (translator of the Bible into Latin). The town and creek are named to award this saint, although others affirmation that the declare comes from original owner of the springs, “Tio” (Uncle) Geronimo Flores. José Antonio Navarro’s brother, Luciano Navarro, also ran a ranch in the area. The Place is approximately 6 miles (10 km) north of Seguin, the Guadalupe County seat.

In the mid-1800s, Geronimo became popular as a social center for German settlers. German settlers from Schumansville moved into the Place in 1860 and formed a community. One enterprising settler opened a bank and German civic center. The community had grown into a small town by 1891, sporting a general store, a say office (former bank), a steam-powered cotton gin, and a population of twenty. A one-teacher instructor brought education to forty students in 1904. By 1917, the reveal office had relocated, sharing occupancy afterward a local feed store. In 1919, a park, complete past a spring-fed swimming pool, was constructed beside Geronimo Creek. After World War II, Geronimo hosted two gins and 123 residents.