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Index

The Communities of Iowa (IA)

Select by first two letters of name

OA	OC	OD	OE	OG	OH
OJ	OK	OL	ON	OP	OR
OS	OT	OV	OW	OX	OY
OZ

Notes about this Index:

#	Indicates a community that is historic and no longer exists. While a few buildings, houses or some ruins might still exists, most historic communities are gone with no trace.
?	Indicates what we call an Orphan. An Orphan is the situation where we have a name with very little information or we're uncertain whether the name is a community, a post office or might be railroad related such as a siding or station.
+	While a post office name generally indicates the community in which it is located, other PO names don't. In this case, we have a PO name but not the community in which its located.

O'Brien [O'Brien Co]Xo

O'Leary [Plymouth Co]X

O'Neill [Dubuque Co]X

Oak [Marion Co]Xo

Oak Grove [Linn Co]Xo

Oak Grove [Poweshiek Co]Xo

Oak Park [Polk Co]Xo

Oak Point [Van Buren Co]Xo

Oak Spring [Davis Co]Xo

Oakdale [Johnson Co]X

Oakfield [Audubon Co]X

Oakland [Clarke Co]Xo

Oakland [Dubuque Co]Xo

Oakland [Franklin Co]X

Oakland [Pottawattamie Co]X

Oakland Acres [Jasper Co]X

Oakland Mills [Henry Co]X

Oakland Valley [Franklin Co]Xo

Oakley [Lucas Co]X

Oakton [Scott Co]Xo

Oakville [Louisa Co]X

Oakwood [Floyd Co]X

Oakwood [Polk Co]Xo

Oakwood [Tama Co]Xo

Oakwood Station [Polk Co]Xh

Oasis [Johnson Co]X

Ocheyedan [Osceola Co]X

Odd [Woodbury Co]Xo

Odebolt [Sac Co]X

Oelwein [Fayette Co]X

Ogden [Boone Co]X

Ogden [Dubuque Co]Xo

Ohio [Madison Co]Xo

Ojedo [Harrison Co]Xo

Okoboji [Dickinson Co]X

Ola [Lucas Co]Xh

Ola [Tama Co]Xo

Olaf [Wright Co]X

Old Balltown [Dubuque Co]X

Old Mission [Winneshiek Co]Xo

Old Peru [Madison Co]X

Old Saint Johns [Harrison Co]Xo

Old Town [Dickinson Co]X

Old Tripoli [Bremer Co]X

Oldfield [Polk Co]Xh

Olds [Henry Co]X

Olin [Jones Co]X

Olio [Union Co]Xo

Oliver [Sac Co]Xo

Olivet [Mahaska Co]X

Olivet [Union Co]Xo

Ollie [Keokuk Co]X

Olmitz [Lucas Co]X

Olympus [Harrison Co]Xh

Onawa [Monona Co]X

Onawa City [Monona Co]Xo

Onawa Junction [Cherokee Co]X

Oneida [Delaware Co]X

Oneska [Mahaska Co]Xo

Onion Grove [Cedar Co]Xo

Ononwa [Louisa Co]Xo

Onslow [Jones Co]X

Ontario [Story Co]X

Opposition [Wapello Co]Xo

Oradell [Marion Co]Xo

Oralabor [Polk Co]X

Oran [Fayette Co]X

Orange [Black Hawk Co]X

Orange [Clinton Co]Xo

Orange City [Sioux Co]X

Orange Grove [Guthrie Co]Xo

Orchard [Mitchell Co]X

Ord [Madison Co]X

Orford [Tama Co]Xo

Orient [Adair Co]X

Orillia [Warren Co]X

Orion [Fayette Co]Xo

Orlando [Wayne Co]Xo

Orleans [Appanoose Co]X

Orleans [Dickinson Co]X

Ormanville [Wapello Co]X

Ornbaum [Mahaska Co]Xo

Oro [Montgomery Co]Xo

Orono [Muscatine Co]Xo

Orrin Glen [Delaware Co]Xo

Orsland [Buena Vista Co]Xo

Orson [Harrison Co]X

Orton [Harrison Co]X

Ortonville [Dallas Co]X

Osage [Fremont Co]Xo

Osage [Mitchell Co]X

Osborne [Clayton Co]X

Osceola [Clarke Co]X

Osgood [Palo Alto Co]X

Oshkosh [Sioux Co]Xo

Oskaloosa [Mahaska Co]X

Oskaloosa Junction [Mahaska Co]Xo

Osprey [Dallas Co]Xo

Osprey [Monroe Co]Xo

Ossian [Winneshiek Co]X

Osterdock [Clayton Co]X

Oswalt [Jasper Co]X

Oswego [Warren Co]Xo

Otho [Webster Co]X

Otis [Linn Co]X

Otisville [Franklin Co]Xo

Otley [Marion Co]X

Oto [Woodbury Co]X

Otranto [Mitchell Co]X

Otranto Station [Mitchell Co]Xo

Otsego [Fayette Co]Xo

Ottawa [Clarke Co]X

Ottawa [Polk Co]X

Otter Creek [Jackson Co]X

Otter Creek [Linn Co]Xo

Otterville [Buchanan Co]X

Ottosen [Humboldt Co]X

Ottumwa [Wapello Co]X

Ottumwa Junction [Wapello Co]X

Overton
See: Pilot Grove

Ovia [Wayne Co]X

Ovid [Taylor Co]Xo

Ovid [Wayne Co]Xo

Owasa [Hardin Co]X

Owego [Woodbury Co]X

Owen [Cerro Gordo Co]X

Owlake [Humboldt Co]Xo

Oxford [Johnson Co]X

Oxford Junction [Jones Co]X

Oxford Mills [Jones Co]X

Oyens [Plymouth Co]X

Ozark [Jackson Co]Xh

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This page was last modified/updated: 17 Feb 2025