City or Town Name

Population

County

Area of State

Has Post Office?

Has Railroad?

Has Express Office?

Oak Grove

16

Poweshiek

Central

Yes

Yes

Yes

Oakland

686

Pottawattamie

Southwest

Yes

Yes

Yes

Oakland Mills

56

Henry

Southeast

Yes

Yes

Yes

Oakland Valley

112

Franklin

North

Yes

No

No

Oakley

26

Lucas

South

Yes

Yes

Yes

Oak Spring

81

Davis

South

Yes

No

No

Oakton

Scott

East

No

Yes

Yes

Oakville

Louisa

Southeast

Yes

Yes

Yes

Oakwood

32

Polk

Central

No

Yes

Yes

Oasis

21

Johnson

East

Yes

Yes

Yes

Ocheyedan

Osceola

Northwest

Yes

Yes

Yes

Odebolt

1122

Sac

West

Yes

Yes

Yes

Oelwein

830

Fayette

Northeast

Yes

Yes

Yes

Ogden

689

Boone

Central

Yes

Yes

Yes

Okoboji

Dickinson

Northwest

Yes

No

Yes

Ola

Lucas

South

Yes

No

No

Olaf

Wright

North

Yes

No

No

Oldfield

Polk

Central

Yes

No

No

Olds

Henry

Southeast

Yes

Yes

Yes

O'Leary

Plymouth

Northwest

Yes

No

No

Olin

519

Jones

East

Yes

Yes

Yes

Olivet

62

Mahaska

South

Yes

Yes

Yes

Ollie

Keokuk

Southeast

Yes

Yes

Yes

Olmitz

Lucas

South

Yes

No

No

Olympus

Harrison

West

Yes

No

No

ONAWA

1358

Monona

West

Yes

Yes

Yes

Oneida

Delaware

East

Yes

Yes

Yes

Onslow

237

Jones

East

Yes

Yes

Yes

Ontario

128

Story

Central

Yes

Yes

Yes

Oralabor

Polk

Central

No

Yes

Yes

ORANGE CITY

1216

Sioux

Northwest

Yes

Yes

Yes

Orchard

154

Mitchell

North

Yes

Yes

Yes

Ord

Madison

South

Yes

No

No

Orient

130

Adair

Southwest

Yes

Yes

Yes

Orilla

Warren

South

Yes

Yes

Yes

Ormanville

58

Wapello

South

Yes

No

No

Ortonville

Dallas

South

Yes

Yes

Yes

OSAGE

1913

Mitchell

North

Yes

Yes

Yes

Osborne

59

Clayton

Northeast

Yes

Yes

Yes

OSCEOLA

2120

Clarke

South

Yes

Yes

Yes

Osgood

Palo Alto

Northwest

Yes

Yes

No

OSKALOOSA

6558

Mahaska

South

Yes

Yes

Yes

Ossian

609

Winneshiek

Northeast

Yes

Yes

Yes

Osterdock

162

Clayton

Northeast

Yes

Yes

Yes

Oswalt

Jasper

Central

Yes

Yes

No

Otho

47

Webster

Central

Yes

Yes

Yes

Otley

271

Marion

South

Yes

Yes

Yes

Oto

247

Woodbury

West

Yes

Yes

No

Otranto

53

Mitchell

North

Yes

No

No

Otranto Station

52

Mitchell

North

Yes

Yes

Yes

Otter Creek

91

Jackson

East

Yes

No

No

Otterville

84

Buchanan

East

Yes

No

No

OTTUMWA

14001

Wapello

South

Yes

Yes

Yes

Ovid

Wayne

South

Yes

No

No

Owasa

Hardin

Central

Yes

Yes

Yes

Oxford

515

Johnson

East

Yes

Yes

Yes

Oxford Junction

752

Jones

East

Yes

Yes

Yes

Oxford Mills

236

Jones

East

Yes

Yes

Yes

Oyens

112

Plymouth

Northwest

Yes

Yes

Yes

Ozark

119

Jackson

East

Yes

No

No