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Index

The Communities of Colorado (CO)

Select by first two letters of name

OA	OB	OC	OE	OF	OG
OH	OJ	OL	OM	OP	OR
OS	OT	OU	OV	OW	OX

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.

Oak Creek [Fremont Co]Xo

Oak Creek [Routt Co]X

Oak Creek Junction [Fremont Co]Xo

Oak Grove [Montrose Co]X

Oak Park [Jefferson Co]X

Oakes [Arapahoe Co]Xo

Oakridge [Routt Co]Xo

Oberon Acres [Jefferson Co]X

Occidental [Huerfano Co]X

Oehlmann Park [Jefferson Co]X

Offield Place [Moffat Co]X

Ogle [Eagle Co]Xo

Ohio City [Gunnison Co]X

Ojo [Huerfano Co]Xo

Olathe [Montrose Co]X

Old Carson [Hinsdale Co]Xh

Old Fort Bent [Otero Co]Xh

Old Fort Lyon [Bent Co]Xo

Old Fort Lyons [Bent Co]X

Old Fort Vasquez [Weld Co]Xh

Old Homestead [Jackson Co]X

Old Hundred [San Juan Co]Xh

Old Line Junction [Pueblo Co]Xo

Old Mountain View [El Paso Co]Xh

Old Roach [Larimer Co]X

Old Towne [Arapahoe Co]X

Old Wells [Cheyenne Co]X

Olinger Gardens [Jefferson Co]X

Oliver [Gunnison Co]Xo

Olney [Bent Co]Xo

Olney Springs [Crowley Co]X

Olympus Heights [Larimer Co]X

Omega [Larimer Co]X

Ophir [San Miguel Co]X

Ophir Loop [San Miguel Co]X

Oradell [Boulder Co]X

Orchard [Morgan Co]X

Orchard [Weld Co]Xo

Orchard City [Delta Co]X

Orchard Mesa [Mesa Co]X

Orchard Park [Fremont Co]X

Orchard Plaza [Arapahoe Co]Xo

Ordway [Crowley Co]X

Ordway [Otero Co]Xo

Oredel [Boulder Co]Xo

Orestod [Eagle Co]X

Orient [Saguache Co]Xo

Ormandale [Pueblo Co]Xo

Ormega [Otero Co]X

Oro City [Arapahoe Co]Xo

Oro City [Lake Co]Xh

Orodell [Boulder Co]X

Orr [Otero Co]X

Orr [Weld Co]Xo

Orsa [Douglas Co]X

Orsburn [Elbert Co]Xo

Orson [Mesa Co]Xo

Ortiz [Conejos Co]X

Osier [Conejos Co]X

Otis [Larimer Co]Xo

Otis [Washington Co]X

Otto [Chaffee Co]Xo

Ouray [Ouray Co]X

Ouray Junction [Montrose Co]Xo

Overland Park [Arapahoe Co]Xo

Oversteg [Gunnison Co]Xo

Overton [El Paso Co]Xo

Ovid [Sedgwick Co]X

Owl Canyon [Larimer Co]X

Oxford [La Plata Co]X

Oxyoke [Jefferson Co]X

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This page was last modified/updated: 22 Mar 2025