There is one place named Mainland in America.
All places in the world called "Mainland".
Riverside (46)
Centerville (43)
Fairview (40)
Midway (39)
Franklin (39)
Union (37)
Greenwood (37)
Marion (36)
Glendale (36)
Salem (36)
Georgetown (35)
Oakland (35)
Liberty (35)
Fairfield (35)
Lincoln (35)
Pleasant Valley (35)
Clinton (34)
Florence (34)
Arlington (34)
Greenville (34)
Bethel (34)
Springfield (34)
Newport (33)
Farmington (33)
Chester (33)
Kingston (33)
Clifton (33)
Milton (33)
Hamilton (33)
Mount Pleasant (32)