Bellville is a city in the U.S. state of Texas and the seat of Austin County. The city's population was 4,206 at the 2020 census. Bellville is on the eastern edge of the Texas-German belt, and Bellville is known for its German culture and descendants of those Germans still call Bellville home.

State Highway 36 and State Highway 159 intersect at Bellville, as do FM 529, FM 1456, and FM 2429.

Bellville was named for Thomas B. Bell, one of Stephen F. Austin's earliest colonists, after his brother and he donated land for the new county seat established by voters in 1846. San Felipe had been the county seat before the war for independence.

From 1860 to 1869, The Bellville Countryman served as Bellville's newspaper, and was published by John Patterson Osterhout.

Bellville is located in Northern Austin County. According to the United States Census Bureau, Bellville has a total area of 2.7 square miles (6.9 km²), all land.

The climate in this area is characterized by relatively high temperatures and evenly distributed precipitation throughout the year. The Köppen climate system describes the weather as humid subtropical, designated as Cfa on weather maps.

As of the 2020 census, Bellville had a population of 4,206, 1,729 households, and 923 families residing in the city. The median age was 40.7 years, 23.9% of residents were under the age of 18, and 21.1% of residents were 65 years of age or older. For every 100 females there were 89.3 males, and for every 100 females age 18 and over there were 82.9 males age 18 and over.

0% of residents lived in urban areas, while 100.0% lived in rural areas.