Iowa Colony is an incorporated Type A General Law City in Brazoria County, Texas, United States. As of 2019 the city has a population of 6,180.
Iowa Colony is located in northern Brazoria County at 29°26′35″N 95°24′56″W / 29.44306°N 95.41556°W / 29.44306; -95.41556 (29.442963, -95.415607). It is on Texas State Highway 288 south of Pearland city limits. Downtown Houston is 22 miles (35 km) to the north.
According to the United States Census Bureau, the city has a total area of 7.3 square miles (19.0 km), of which 0.015 square miles (0.04 km), or 0.21%, is water.
As of the census of 2000, there were 804 people, 279 households, and 219 families residing in the city. The population density was 139.7 people per square mile (53.9/km²). There were 302 housing units at an average density of 52.5/sq mi (20.2/km²). The racial makeup of the city was 73.01% White, 6.72% African American, 0.12% Native American, 7.34% Asian, 11.19% from other races, and 1.62% from two or more races. Hispanic or Latino of any race were 25.12% of the population.
There were 279 households out of which 35.1% had children under the age of 18 living with them, 65.2% were married couples living together, 9.0% had a female householder with no husband present, and 21.5% were non-families. 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. The average household size was 2.88 and the average family size was 3.29.
In the city, the population was spread out with 28.0% under the age of 18, 7.5% from 18 to 24, 29.9% from 25 to 44, 24.5% from 45 to 64, and 10.2% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 103.0 males. For every 100 females age 18 and over, there were 99.7 males.
The median income for a household in the city was $47,019, and the median income for a family was $50,000. Males had a median income of $40,313 versus $28,500 for females. The per capita income for the city was $18,935. About 6.6% of families and 6.1% of the population were below the poverty line, including 3.7% of those under age 18 and 15.2% of those age 65 or over.