Arnold, Texas Unincorporated community in Texas, United States Arnold is an unincorporated community in Collin County, located in the U.S. state of Texas.[1] References ^ a b "Arnold, Texas". Geographic Names Information System. United States Geological Survey, United States Department of the Interior. Municipalities and communities of Collin County, Texas, United StatesCounty seat: McKinneyCities Allen Anna Blue Ridge Carrollton‡ Celina‡ Dallas‡ Farmersville Frisco‡ Garland‡ Josephine‡ Lavon Lowry Crossing Lucas McKinney Melissa Murphy Nevada Parker Plano‡ Princeton Richardson‡ Royse City‡ Sachse‡ Van Alstyne‡ Weston Wylie‡ Collin County mapTowns Fairview Hebron‡ New Hope Prosper‡ St. Paul CDPs Seis Lagos Westminster Othercommunities Altoga Arnold Beverly Hill Bloomdale Branch Chambersville Chambliss Clear Lake Climax Collin Copeville Cowley Culleoka Desert Fayburg Forest Grove Frognot Kelly Little Ridge Milligan Millwood New Mesquite Pike Rhea Mills Rockhill Sedalia Snow Hill Trinity Park Valdasta Walnut Grove Winningkoff Historicalcommunities Buckner Lebanon Lolaville Renner Shepton Wetsel Ghost towns Biggers Marilee Nickelville Parris Roland Verona Footnotes‡This populated place also has portions in an adjacent county or counties Texas portal United States portal