what county is plano texas in
Plano is located in Collin County, TX. The population is 270,816, making Plano the largest city in Collin County and the 9th largest city in the state of Texas. There are 79 public schools in Plano with an average Homefacts rating of A-. The total crime rate for Plano is low, and there are 102 registered sex offenders residing in the city.