High Quality Content by WIKIPEDIA articles! Orange County is one of 254 counties of the State of Texas and its county seat is the city of Orange, Texas. As of the 2010 census, its the population was 81,837. Orange County is the county in the very southeastern corner of Texas, with a boundary with Louisiana but does not have a seacoast on the Gulf of Mexico as Jefferson County and Sabine Lake border Orange County to the South. Orange County is located in the general Golden Triangle of Texas - the Jefferson County - Orange County area.