Grand Prairie is a city in Dallas County (USA), with a significant overlap into Tarrant County, and a minor overlap into Ellis County. As of the 2000 census, the city had a total population of 127,427. Grand Prairie is located at 32°42′55″N 97°1′1″W / 32.71528°N 97.01694°W (32.715266, -97.016864). According to the United States Census Bureau, the city has a total area of 211.2 km² (81.5 mi²). The West Fork of the Trinity River and a major tributary, Johnson Creek, flow through Grand Prairie.
Interstate highways 20 and 30 run east-west through the city, along with SH 303, SH 180, and SH 161, a future extension of the Dallas outerloop (President George Bush Turnpike).