Robertson County is a county in the U.S. state of Texas. As of the 2020 census, its population was 16,757. Its county seat is Franklin. The county was created in 1837 and organized the following year. It is named for Sterling C. Robertson, an early settler who signed the Texas Declaration of Independence.

Franklin is a city in, and the county seat of, Robertson County, Texas, United States. It is within the Brazos Valley, on the cusp of the East and Central Texas regions. As of the 2020 census, the city population was 1,614. The original name of the town was Morgan and it was made county seat in 1879.