Anguilla, Antigua and Barbuda, Aruba, Bahamas, Barbados, Belize, Bermuda, Brazil, Canada (B) (NB) (P), Cayman Islands, Colombia, Costa Rica, Cuba, Dominica, Dominican Republic, Ecuador, El Salvador, Guadeloupe, Guatemala, Haiti, Honduras, Martinique, Mexico, Montserrat, Netherlands Antilles, Panama, Puerto Rico, St Kitts and Nevis, St Lucia, St Pierre and Miquelon (B) (P), St Vincent and The Grenadines, Trinidad and Tobago, Turks and Caicos Islands, USA (B), Venezuela, Virgin Islands (British) (NB), Virgin Islands (U.S.) (NB).
Vagrant to Austria, Belgium, Bulgaria, Denmark, Faroe Islands, France, Germany, Gibraltar, Greenland, Hungary, Iceland, Ireland, Jamaica, Kiribati, Morocco, Netherlands, Norway, Poland, Portugal, Senegal, South Africa (B), Spain, Svalbard and Jan Mayen Islands, Sweden, Switzerland, United Kingdom.
Northern California, eastern Washington and interior British Columbia across prairie provinces and northern mountain and plains states; Great Lakes to Maritime Provinces. Winters in southern portion of breeding range south to Gulf Coast, Central America and Greater Antilles, increasingly ranging to Lesser Antilles.
 
Population
Estimated population is 2,600,000 (2010).
Ring-billed Gull (Larus delawarensis) [XC543313]
by id from Lansing, Tompkins County, New York, United States (song, courtship display song)
Ring-billed Gull (Larus delawarensis) [XC817547]
by Marc Boisvert from Tawas Point State Park (near East Tawas), Iosco County, Michigan, United States (call)
Subspecies
Sometimes considered to form a superspecies with Mew Gull (Larus canus).