Tilmon is an unincorporated community in Caldwell County, in the U.S. state of Texas. According to the Handbook of Texas, the community had a population of 117 in 2000. It is located within the Greater Austin metropolitan area.

The Old Settler's Music Festival is held in the community.

Tilmon stands on Farm to Market Road 3158, approximately 10 mi (16 km) southeast of Lockhart in the southeastern part of Caldwell County.

Tilmon had a school with one teacher and 47 students in 1905; the community then had separate schools for African American and White children as of 1936. Today, the community is served by the Lockhart Independent School District.