This collection contains digital atlases, farm directories, and plat books for all 99 Iowa counties. We have collated these from a variety of online sources, and provide them here as a single source for all online Iowa Atlases, Iowa Farm Directories, and Iowa Plat Books.

Many research problems can be solved with the use of maps, atlases and gazetteer’s. Maps that show the location and approximate size of the town also revealed neighboring communities and nearby landmarks, such as rivers and mountains, which may be noted in an ancestor’s diary or photo album.

Researching with Iowa Atlases

An atlas is a collection of maps and can be useful in more ways than one. In addition to pinpointing the location of the family homestead, commercial atlases include advertisements of local establishments and biographical sketches of its subscribers, in some cases accompanied by live lithographs or photographs as well.

Researching with Iowa Farm Directories

As with the city directory, county or rural directories can be helpful in placing an ancestor in a certain place at a certain time. These directories, sometimes called farm directories, cover a much larger area (an entire county or, in the regional directories, several counties) and were used to advertise goods and services in rural areas.

Researching with Iowa Plat Books or Land Ownership Maps

According to Wikipedia, a plat “consists of a map, drawn to scale, showing the divisions of a piece of land.” Genealogists find plat maps exceedingly useful in that they usually show who owned a particular plot of land during a given year. Plat maps can assist in locating nearby cemeteries, figuring out who were their neighbors (as they might be relatives) and determining how long a person owned the land.

Adair County

Adams County

Allamakee County

Appanoose County

Audubon County

Benton County

Black Hawk County

Boone County

Bremer County

Buchanan County

Buena Vista County

Butler County

Calhoun County

Carroll County

Cass County

Cedar County

Cerro Gordo County

Cherokee County

Chickasaw 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

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

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

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