Hebbronville ( HEB-rən-vil) is a census-designated place (CDP) in and the county seat of Jim Hogg County, Texas, United States. The population was 4,558 at the 2010 census. In 1918, Helen Sewel Harbison became the first woman in Texas to cast a ballot, two years before the implementation of the Nineteenth Amendment to the United States Constitution.
The Colegio Altamirano, founded by settlers of Spanish ancestry who wanted their children to learn Spanish culture, was an institution in Hebbronville from 1897 until its closing in 1958.
Hebbronville is located in northern Jim Hogg County at 27°18′41″N 98°40′52″W (27.311259, -98.680998). It is bordered to the east by Las Lomitas and to the north by Duval County.
Texas State Highway 16 (Smith Avenue) passes through the center of town, leading north 40 miles (64 km) to Freer and southwest 51 miles (82 km) to Zapata. Texas State Highway 359 (Viggie Street) leads northwest 56 miles (90 km) to Laredo and northeast 53 miles (85 km) to Alice, while Texas State Highway 285 leads east 34 miles (55 km) to Falfurrias.
According to the United States Census Bureau, the Hebbronville CDP has a total area of 6.3 square miles (16.2 km2), all of it land.
Hebbronville has a borderline humid subtropical climate (Köppen climate classification Cfa)/hot semi-arid climate (Köppen BSh). Summers are very hot and humid: 152 afternoons each year top 90 °F or 32.2 °C, with 27.6 afternoons reaching 100 °F or 37.8 °C and during the summer of 2009 eleven afternoons topped 110 °F or 43.3 °C. During July and August combined, all but three mornings stay above 68 °F or 20 °C and seven mornings per year stay above 77 °F or 25 °C, with as many as forty mornings staying over this temperature during 1998.