Dimmitt is located on the old Ozark Trail, a road system from St. Louis, Missouri, to El Paso, Texas. The Ozark Trail is marked at the courthouse. In 1942, a meteorite was discovered in Castro County and named after the town of Dimmitt. It is one of 311 approved meteorites from Texas, United States.
As of the 2010 United States Census, there were 4,393 people living 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 living in the city. The population density was 2,116.4 people per square mile. There were 1,692 housing units at an average density of 818.5 per square mile. 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.
Education
Dimmitt is served by the Dimmitt Independent School District. Dimmitt I.S.D has a rich history of excellence in sports, mainly basketball. The Bobcats and Bobbies have won several state championships. ;Bobbies
1953–1954 1A-2A Dimmitt
1954–1955 1A Dimmitt
1992–1993 3A Dimmitt
;Bobcats
1951–1952 1A-2A Division 2 Dimmitt
1974–1975 2A Dimmitt
1981–1982 3A Dimmitt
1982–1983 3A Dimmitt
Healthcare
Dimmitt is served by the Castro County Healthcare System. It also serves the surrounding county and the cities of Nazareth and Hart.