{"id":2520,"date":"2023-04-04T12:01:31","date_gmt":"2023-04-04T12:01:31","guid":{"rendered":"https:\/\/townsvillages.com\/us\/?p=2520"},"modified":"2026-08-20T23:24:34","modified_gmt":"2026-08-20T23:24:34","slug":"bonneville-county","status":"publish","type":"post","link":"https:\/\/townsvillages.com\/us\/bonneville-county\/","title":{"rendered":"Bonneville County, Idaho"},"content":{"rendered":"

Bonneville County is a county in Idaho, United States, anchored by Idaho Falls on the Snake River in the eastern part of the state. It had a population of 123,964 at the 2020 census and covers 1,901 square miles (4,920 km2) centred near 43\u00b023\u2032N 111\u00b036\u2032W.<\/p>\n

Idaho Falls is the county seat, and its postal code is 83401. The county holds 6 incorporated cities and towns, 1 census-designated place, and several unincorporated communities. It sits in the Mountain time zone and carries FIPS code 16019.<\/p>\n

Towns & Villages in Bonneville County<\/h2>\n

Bonneville County has one large city, five smaller incorporated towns, one census-designated place, and a scatter of unincorporated crossroads communities in its rural east and west. Idaho Falls dominates the population; the rest of the county is lightly settled ranch and canyon country.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Place<\/th>\nType<\/th>\nPop.<\/th>\nZIP<\/th>\n<\/tr>\n<\/thead>\n
Idaho Falls<\/td>\nCity · seat<\/td>\n—<\/td>\n83401<\/td>\n<\/tr>\n
Ammon<\/td>\nCity<\/td>\n—<\/td>\n83406<\/td>\n<\/tr>\n
Iona<\/td>\nCity<\/td>\n—<\/td>\n83427<\/td>\n<\/tr>\n
Irwin<\/td>\nCity<\/td>\n—<\/td>\n83428<\/td>\n<\/tr>\n
Ririe<\/td>\nCity<\/td>\n—<\/td>\n—<\/td>\n<\/tr>\n
Swan Valley<\/td>\nCity<\/td>\n—<\/td>\n83449<\/td>\n<\/tr>\n
Ucon<\/td>\nCity<\/td>\n—<\/td>\n83454<\/td>\n<\/tr>\n
Lincoln<\/td>\nCDP<\/td>\n—<\/td>\n—<\/td>\n<\/tr>\n
Beachs Corner<\/td>\nUnincorp.<\/td>\n—<\/td>\n—<\/td>\n<\/tr>\n
Bone<\/td>\nUnincorp.<\/td>\n—<\/td>\n—<\/td>\n<\/tr>\n
Osgood<\/td>\nUnincorp.<\/td>\n—<\/td>\n—<\/td>\n<\/tr>\n
Palisades<\/td>\nUnincorp.<\/td>\n—<\/td>\n—<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Idaho Falls is the only city with a population figure the Census Bureau publishes separately at the county level in the sources checked for this page; per-place 2020 counts for the smaller cities are omitted here rather than guessed. Ririe sits mostly in Jefferson County, with only a small slice inside Bonneville County.<\/p>\n

ZIP Codes<\/h2>\n