Iowa Cities that begin with O

32 cities

City
County
2025 Pop. ↓
OttumwaWapello County25,116
OskaloosaMahaska County11,388
Orange CitySioux County6,477
OelweinFayette County5,714
OsceolaClarke County5,664
OsageMitchell County3,471
OnawaMonona County2,756
OgdenBoone County1,933
OaklandPottawattamie County1,515
OdeboltSac County978
OssianWinneshiek County769
OkobojiDickinson County717
OxfordJohnson County706
OlinJones County654
OrleansDickinson County500
Oxford JunctionJones County422
OcheyedanOsceola County409
OthoWebster County401
OrientAdair County350
OllieKeokuk County196
OnslowJones County194
OakvilleLouisa County187
OldsHenry County184
Oakland AcresJasper County178
Oak HillsDes Moines County145
OyensPlymouth County93
OrchardMitchell County67
OtoWoodbury County67
OsterdockClayton County42
OttosenHumboldt County41
OtrantoMitchell County29
OwasaFranklin County29