List of 13 Zip Codes in O'Brien County, Iowa

On this page, we'll list out the 13 O'Brien County, Iowa ZIP codes we have, including the land area and county name of each code.

Iowa is the 26th largest state by total land area, with a land area of 56,273 square miles (145,746 square kilometers) and has a total population of 3,150,011 people as of the most recent U.S. Census survey.

O'Brien County makes up approximately 1.82% of the total land area for Iowa and we have 13 zip codes for the county in our database, which you can see details of below, with land area information for each zip code.

More Counties in Iowa

If you want to search and find zip codes for different counties in Iowa, the list below contains links to each of the 105 Iowa counties we have data for.

• Adair County
• Adams County
• Allamakee County
• Appanoose County
• Atchison County
• Audubon County
• Benton County
• Black Hawk County
• Boone County
• Bremer County
• Buchanan County
• Buena Vista County
• Burt County
• Butler County
• Calhoun County
• Carroll County
• Cass County
• Cedar County
• Cerro Gordo County
• Cherokee County
• Chickasaw County
• Clark County
• Clarke County
• Clay County
• Clayton County
• Clinton County
• Crawford County
• Dallas County
• Davis County
• Decatur County
• Delaware County
• Des Moines County
• Dickinson County
• Dubuque County
• Emmet County
• Faribault County
• Fayette County
• Floyd County
• Franklin County
• Fremont County
• Greene County
• Grundy County
• Guthrie County
• Hamilton County
• Hancock County
• Hardin County
• Harrison County
• Henry County
• Howard County
• Humboldt County
• Ida County
• Iowa County
• Jackson County
• Jasper County
• Jefferson County
• Johnson County
• Jones County
• Keokuk County
• Kossuth County
• Lee County
• Linn County
• Louisa County
• Lucas County
• Lyon County
• Madison County
• Mahaska County
• Marion County
• Marshall County
• Martin County
• Mills County
• Mitchell County
• Monona County
• Monroe County
• Montgomery County
• Muscatine County
• O'Brien County
• Osceola County
• Page County
• Palo Alto County
• Plymouth County
• Pocahontas County
• Polk County
• Pottawattamie County
• Poweshiek County
• Ringgold County
• Sac County
• Scotland County
• Scott County
• Shelby County
• Sioux County
• Story County
• Tama County
• Taylor County
• Union County
• Van Buren County
• Wapello County
• Warren County
• Washington County
• Wayne County
• Webster County
• Winnebago County
• Winneshiek County
• Woodbury County
• Worth County
• Wright County

Data Source(s)

All of the zip code data on this page is sourced from the United States Census Bureau geography reference files.

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