Killeen is a city in Bell County, Texas, in the United States. According to the 2010 census the population of Killeen is 127,921 making it the twenty-first most populous city in the state of Texas. It is the 'principal city' of the KilleenTempleFort Hood Metropolitan Statistical Area. Killeen is directly adjacent to the main cantonment of Fort Hood, and as such its economy heavily depends on the post and the soldiers (and their families) stationed there. In 1881, the Gulf, Colorado and Santa Fe Railway extended its tracks through central Texas, buying 360 acres (1.5 km) a few miles southwest of a small farming community known as Palo Alto, which had existed since about 1872. The railroad platted a 70-block town on its land and named it after Frank P. Killeen, the assistant general manager of the railroad. By the next year the town included a railroad depot, a saloon, several stores, and a school.
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