Iowa Colony is an incorporated Home Rule City in Brazoria County, Texas, United States, in the Houston metropolitan area.

The community received a post office in 1919, and rice farming was introduced there in 1920.

By 1961 the Iowa Colony post office had closed, yet during the 1960s the settlement began to grow vigorously as part of the greater Houston area.

The city hall, community center, and municipal court are all housed in the same building, next to the fire department.

Iowa Colony showed unprecedented growth, with an estimated 2019 population of 3,233.

[11] It is on Texas State Highway 288 south of Pearland city limits.

[12] As of the 2020 United States census, there were 8,154 people, 1,750 households, and 1,508 families residing in the city.

19.0% of all households were made up of individuals, and 4.7% had someone living alone who was 65 years of age or older.

[22] Alvin High School served all Iowa Colony residents,[23] until fall 2006, when Manvel High opened to immediately accept 9th and 10th grades and phase in 11th and 12th grades in two years.

[32] Additionally, Alvin Community College provides basic undergraduate courses and adult education.