Holiday Closing: all county offices are closed Monday, May 30, for the Memorial Day holiday, and will re-open Tuesday, May 31. This includes parks offices, public works, courts and all other administrative offices.
Collin County Population EstimatesAerial maps of Collin County and the DFW AreaMaps of Collin County Precincts and State Districts (As of January 1, 2020)Maps of State election districtsU.S. Census Quickfacts about Collin CountyConsumer Price Index and inflation figuresCollin County Appraisal District including tax rates for all subdivisions in Collin CountyPlano/Collin County League of Women VotersTexas Secretary of State- Elections DivisionTexas Legislative InformationTexas Ethics Commission
