Royse City is a city in Rockwall County in the U.S. state of Texas. It also extends into Collin and Hunt Counties. The population was 2,957 at the 2000 census, rising to 9,349 in 2010. The estimated population in 2018 was 12,998.
Garrett Burgess Griffin Royse, better known as Byrd Royse, was born in Adair County, Kentucky, on January 31, 1838, to William and Mary Stone Royse. He was the seventh of 14 children. Around 1850, Royse's future grandmother-in-law, Mrs. Nancy McCasland, and her sons bought several tracts of land that were later to be known as Royse City.
Royse was instrumental in getting the Missouri, Kansas and Texas Railway line brought from Greenville to Dallas through Rockwall County. Royse City was settled in 1885, when the railway came through the area. The town was named after G. B. Royse, who plotted the town and sold the first lots.
After its founding, Royse City preserved its stable, small, country-town status due to its proximity to Garland (21 miles away) and Dallas (33 miles).
Interstate 30 was constructed just south of the city in the mid-1960s.