Southwest Idaho Cities

43 cities

City
Rank
County
2025 Pop. ↓
Boise City1Ada County235,012
Meridian2Ada County145,039
Nampa3Canyon County122,906
Caldwell4Canyon County73,466
Eagle5Ada County33,285
Kuna6Ada County30,427
Star7Ada County19,590
Mountain Home8Elmore County17,139
Garden City9Ada County13,110
Middleton10Canyon County11,987
Emmett11Gem County9,006
Payette12Payette County8,932
Fruitland13Payette County7,392
Weiser14Washington County6,320
American Falls15Power County4,927
Hidden Springs16Ada County3,910
Homedale17Owyhee County3,300
Mountain Home AFB18Elmore County3,170
Parma19Canyon County2,185
Wilder20Canyon County1,745
Avimor21Ada County1,642
New Plymouth22Payette County1,600
Glenns Ferry23Elmore County1,318
Marsing24Owyhee County1,273
Robie Creek25Ada County1,256
Horseshoe Bend26Boise County909
Greenleaf27Canyon County776
Letha28Gem County715
Notus29Canyon County601
Melba30Canyon County598
Idaho City31Boise County569
Grand View32Owyhee County478
Garden Valley33Boise County413
Cambridge34Washington County364
Hammett35Elmore County316
Rockland36Power County270
Midvale37Washington County229
Murphy38Owyhee County215
Crouch39Boise County189
Bruneau40Owyhee County51
Placerville41Boise County49
Lowman42Boise County27
Banks43Boise County6

About Southwest Idaho

Ada County, Canyon County, Elmore County, Payette County, Gem County, Owyhee County, Washington County, Boise County and Power County are the counties that are generally considered part of Southwest Idaho.