Dimmitt (/ˈdɪmɪt/ DIM-it) is a city and county seat in Castro County, Texas, United States. The population was 4,393 at the 2010 census.
Dimmitt is located slightly west of the center of Castro County at 34°32′57″N 102°18′55″W / 34.54917°N 102.31528°W / 34.54917; -102.31528 (34.549052, −102.315355). According to the United States Census Bureau, the city has a total area of 3.2 square miles (8.4 km), of which 3.2 square miles (8.2 km) is land and 0.1 square miles (0.3 km), or 3.26%, is water.
U.S. Route 385 passes through the city, leading north 20 miles (32 km) to Hereford, the seat of Deaf Smith County, and south 22 miles (35 km) to Springlake. Texas State Highway 86 crosses US 385 near the center of town and leads east 32 miles (51 km) to Tulia and west 33 miles (53 km) to Bovina.
As of the 2010 United States Census, there were 4,393 people residing in the city. The racial makeup of the city was 68.8% Hispanic or Latino, 27.6% White, 2.3% Black, 0.3% Native American, 0.5% Asian, 0.1% from some other race and 0.3% from two or more races.
As of the census of 2000, there were 4,375 people, 1,464 households, and 1,124 families residing in the city. The population density was 2,116.4 people per square mile (816.0/km²). There were 1,692 housing units at an average density of 818.5 per square mile (315.6/km²). The racial makeup of the city was 75.02% White, 2.99% African American, 1.69% Native American, 18.10% from other races, and 2.19% from two or more races. Hispanic or Latino of any race were 56.94% of the population.
There were 1,464 households out of which 39.6% had children under the age of 18 living with them, 60.7% were married couples living together, 12.0% had a female householder with no husband present, and 23.2% were non-families. 22.1% of all households were made up of individuals and 12.4% had someone living alone who was 65 years of age or older. The average household size was 2.94 and the average family size was 3.46.
In the city, the population was spread out with 33.4% under the age of 18, 9.1% from 18 to 24, 22.2% from 25 to 44, 21.3% from 45 to 64, and 13.9% who were 65 years of age or older. The median age was 32 years. For every 100 females, there were 93.8 males. For every 100 females age 18 and over, there were 89.5 males.
The median income for a household in the city was $27,454, and the median income for a family was $33,885. Males had a median income of $24,575 versus $20,162 for females. The per capita income for the city was $14,228. About 19.0% of families and 23.1% of the population were below the poverty line, including 31.1% of those under age 18 and 16.4% of those age 65 or over.