Falfurrias is a city in and the county seat of Brooks County, Texas, United States. Its population was 4,609 at the 2020 census, in a county that in the same census was just over 7,000. The town is named for founder Edward Cunningham Lasater's ranch, La Mota de Falfurrias. In 1893, the Falfurrias ranch was one of the largest in Texas at some 350,000 acres (140,000 ha).