The population was 7,237 at the 2000 census . Founded in 1901, Dalhart is named for its location on the border of Dallam and Hartley counties.
As of the census of 2000, there were 7,237 people, 2,779 households, and 1,939 families residing in the city. The population density was 1,686.1 people per square mile (651.3/km²). There were 3,101 housing units at an average density of 722.5/sq mi (279.1/km²). The racial makeup of the city was 85.44% White , 1.46% African American , 0.79% Native American , 0.32% Asian , 0.01% Pacific Islander , 9.96% from other races , and 2.02% from two or more races. Hispanic or Latino of any race were 22.80% of the population.
There were 2,779 households out of which 36.2% had children under the age of 18 living with them, 55.7% were married couples living together, 9.6% had a female householder with no husband present, and 30.2% were non-families. 26.8% of all households were made up of individuals and 12.3% had someone living alone who was 65 years of age or older. The average household size was 2.57 and the average family size was 3.12.
In the city the population was spread out with 29.7% under the age of 18, 7.7% from 18 to 24, 27.7% from 25 to 44, 21.7% from 45 to 64, and 13.2% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 95.0 males. For every 100 females age 18 and over, there were 92.8 males.
The median income for a household in the city was $30,897, and the median income for a family was $39,193. Males had a median income of $29,521 versus $19,899 for females. The per capita income for the city was $16,530. About 8.5% of families and 11.8% of the population were below the poverty line , including 13.0% of those under age 18 and 19.5% of those age 65 or over.
Chip Woolley, who graduated from Dalhart High School in 1982.