All U.S. Census Counties

Official U.S. Census Bureau and federal geographic directory listings. Showing 79 total records.

Entity Name	Classification	Location / State	GEOID	Land Area
O'Brien County	County	IA	19141	573.04 sq mi
Oakland County	County	MI	26125	867.43 sq mi
Obion County	County	TN	47131	544.85 sq mi
Ocean County	County	NJ	34029	628.29 sq mi
Oceana County	County	MI	26127	538.11 sq mi
Ochiltree County	County	TX	48357	917.68 sq mi
Oconee County	County	GA	13219	184.36 sq mi
Oconee County	County	SC	45073	626.60 sq mi
Oconto County	County	WI	55083	997.48 sq mi
Ogemaw County	County	MI	26129	563.51 sq mi
Oglala Lakota County	County	SD	46102	2,093.60 sq mi
Ogle County	County	IL	17141	758.65 sq mi
Oglethorpe County	County	GA	13221	439.06 sq mi
Ohio County	County	IN	18115	86.15 sq mi
Ohio County	County	KY	21183	587.10 sq mi
Ohio County	County	WV	54069	106.03 sq mi
Okaloosa County	County	FL	12091	929.78 sq mi
Okanogan County	County	WA	53047	5,266.19 sq mi
Okeechobee County	County	FL	12093	769.30 sq mi
Okfuskee County	County	OK	40107	618.46 sq mi
Oklahoma County	County	OK	40109	708.90 sq mi
Okmulgee County	County	OK	40111	697.44 sq mi
Oktibbeha County	County	MS	28105	457.63 sq mi
Oldham County	County	KY	21185	187.29 sq mi
Oldham County	County	TX	48359	1,500.52 sq mi
Oliver County	County	ND	38065	722.40 sq mi
Olmsted County	County	MN	27109	653.51 sq mi
Oneida County	County	ID	16071	1,198.95 sq mi
Oneida County	County	NY	36065	1,212.44 sq mi
Oneida County	County	WI	55085	1,113.95 sq mi
Onondaga County	County	NY	36067	778.39 sq mi
Onslow County	County	NC	37133	762.12 sq mi
Ontario County	County	NY	36069	644.03 sq mi
Ontonagon County	County	MI	26131	1,310.98 sq mi
Orange County	County	CA	06059	793.25 sq mi
Orange County	County	FL	12095	903.04 sq mi
Orange County	County	IN	18117	398.38 sq mi
Orange County	County	NY	36071	812.08 sq mi
Orange County	County	NC	37135	397.59 sq mi
Orange County	County	TX	48361	333.80 sq mi
Orange County	County	VT	50017	687.01 sq mi
Orange County	County	VA	51137	340.46 sq mi
Orangeburg County	County	SC	45075	1,106.38 sq mi
Oregon County	County	MO	29149	789.84 sq mi
Orleans County	County	NY	36073	391.26 sq mi
Orleans County	County	VT	50019	694.54 sq mi
Orleans Parish	County	LA	22071	169.58 sq mi
Orocovis Municipio	County	PR	72107	63.62 sq mi
Osage County	County	KS	20139	705.51 sq mi
Osage County	County	MO	29151	606.52 sq mi