Welcome to our alphabetical list of counties in Iowa A-Z! We’re happy you’re here and hope to answer all of your Iowa-related questions, including: How many counties are there in Iowa? What were the original counties of Iowa? What is the smallest county in Iowa? And much more! So if you find yourself trying to learn more about Iowa counties A-Z, keep reading. You’ll find the most comprehensive alphabetical list of counties in Iowa A-Z below.
A
Adair
Adams
Allamakee
Appanoose
Audubon
B
Benton
Black Hawk
Boone
Bremer
Buchanan
Buena Vista
Butler
C
Calhoun
Carroll
Cass
Cedar
Cerro Gordo
Cherokee
Chickasaw
Clarke
Clay
Clayton
Clinton
Crawford
D
Dallas
Davis
Decatur
Delaware
Des Moines
Dickinson
Dubuque
E
Emmet
F
Fayette
Floyd
Franklin
Fremont
G
Greene
Grundy
Guthrie
H
Hamilton
Hancock
Hardin
Harrison
Henry
Howard
Humboldt
I
Ida
Iowa
J
Jackson
Jasper
Jefferson
Johnson
Jones
K
Keokuk
Kossuth
L
Lee
Linn
Louisa
Lucas
Lyon
M
Madison
Mahaska
Marion
Marshall
Mills
Mitchell
Monona
Monroe
Montgomery
Muscatine
N
O
O’Brien
Osceola
P
Page
Palo Alto
Plymouth
Pocahontas
Polk
Pottawattamie
Poweshiek
Q
R
Ringgold
S
Sac
Scott
Shelby
Sioux
Story
T
Tama
Taylor
U
Union
V
Van Buren
W
Wapello
Warren
Washington
Wayne
Webster
Winnebago
Winneshiek
Woodbury
Worth
Wright
X
Y
Z
Dubuque and Demoine (later changed to Des Moines)