County  Appraisal District     Cities in that county
Collin

www.collincad.org

(Allen, Frisco, McKinney,Plano)
Cooke     www.cookecad.org (Gainesville, Valley View)
Dallas www.dallascad.org (Addison, Carrollton, Cedar Hill, Dallas, DeSoto, Duncanville, Garland, Grand Prairie, Irving, Lancaster, Mesquite, Richardson)
Denton    

www.dentoncad.com

(Aubrey, Corinth, Denton, Flower Mound, Frisco, Justin, Lewisville, Little Elm, Roanoke, The Colony, Trophy Club)
Ellis www.elliscad.org (Ennis, Midlothian, Red Oak, Palmer, Waxahachie)
Grayson

www.graysoncad.org       

(Collinsville, Denison, Sherman, Van Alstyne, Whitesboro)
Hood www.hood-cad.org         (Cresson, Granbury)
Johnson www.johnsoncad.com (Alvarado, Burleson, Cleburne, Joshua)
Kaufman www.kaufman-cad.org (Crandall, Forney, Kaufman, Mabank, Seagoville, Terrell)
Parker www.parkercad.org

(Aledo, Annetta, Millsap, Mineral Wells, Reno, Springtown, Weatherford)

Rockwall www.rockwallcad.com       (Fate, Heath, Rockwall, Royse City)
Tarrant

www.tad.org

(Arlington, Azle, Bedford, Benbrook, Colleyville, Crowley, Euless, Fort Worth, Grapevine, Haltom City, Haslet, Hurst, Keller, Mansfield, North Richland Hills, Southlake, Watauga)