 Grand Prairie as of 2012 has 320 municipal police officers

The city of Grand Prairie is a voluntary member of the North Central Texas Council of Governments association, the purpose of which is to coordinate individual and collective local governments and facilitate regional solutions, eliminate unnecessary duplication, and enable joint decisions.The Bureau of Prisons (BOP), of the U.S. Department of Justice runs the Grand Prairie Office Complex on the grounds of the Grand Prairie Armed Forces Reserve Complex.Within the complex the BOP operates the Designation and Sentence Computation Center (DSCC), which calculates federal sentences, keeps track of the statutory "good time" accumulated by inmates and lump sum extra "good time" awards, and detainers.