United States Cities Starting with O
Cities in the United States with population greater than 10,000 starting with the letter $O.
| City | 2021 Population | State |
|---|
| Oklahoma City | 669,347 | Oklahoma |
| Omaha | 479,978 | Nebraska |
| Oakland | 440,981 | California |
| Orlando | 290,520 | Florida |
| Oxnard | 208,101 | California |
| Overland Park | 201,034 | Kansas |
| Ontario | 193,594 | California |
| Oceanside | 175,710 | California |
| Olathe | 142,119 | Kansas |
| Orange | 137,109 | California |
| Odessa | 129,928 | Texas |
| Orem | 98,624 | Utah |
| O'Fallon | 89,291 | Missouri |
| Ogden | 88,915 | Utah |
| Oshkosh | 67,408 | Wisconsin |
| Ocala | 61,810 | Florida |
| Owensboro | 60,903 | Kentucky |
| Orland Park | 57,213 | Illinois |
| Oak Lawn | 54,206 | Illinois |
| Olympia | 53,630 | Washington |
| Oak Park | 52,797 | Illinois |
| Ocoee | 49,231 | Florida |
| Oro Valley | 47,502 | Arizona |
| Oakland Park | 45,170 | Florida |
| Ormond Beach | 44,591 | Florida |
| Oakley | 43,387 | California |
| Oviedo | 42,436 | Florida |
| Odenton | 41,846 | Maryland |
| Olive Branch | 40,382 | Mississippi |
| Oswego | 38,390 | Illinois |
| Oregon City | 37,769 | Oregon |
| Owasso | 37,547 | Oklahoma |
| Oakton | 36,997 | Virginia |
| Oakville | 36,407 | Missouri |
| Oak Creek | 36,163 | Wisconsin |
| Olney | 35,191 | Maryland |
| Owings Mills | 35,081 | Maryland |
| Orangevale | 34,824 | California |
| Oildale | 34,763 | California |
| Opelika | 31,472 | Alabama |
| Orcutt | 31,118 | California |
| Oceanside | 30,604 | New York |
| O'Fallon | 29,635 | Illinois |
| Oak Ridge | 29,384 | Tennessee |
| Oak Park | 29,141 | Michigan |
| Oxford | 28,996 | Mississippi |
| Oakleaf Plantation | 28,237 | Florida |
| Oakdale | 27,823 | Minnesota |
| Oak Forest | 26,797 | Illinois |
| Owatonna | 25,662 | Minnesota |
| Ossining | 24,454 | New York |
| Orchards | 24,335 | Washington |
| Ottumwa | 24,274 | Iowa |
| Okemos | 24,141 | Michigan |
| Oak Ridge | 24,004 | Florida |
| Oakdale | 23,998 | California |
| Oak Harbor | 23,975 | Washington |
| Oroville | 23,951 | California |
| Oxford | 23,588 | Ohio |
| Old Bridge | 23,545 | New Jersey |
| Oxford | 21,075 | Alabama |
| Ozark | 21,060 | Missouri |
| Oregon | 20,343 | Ohio |
| Orinda | 20,136 | California |
| Old Jamestown | 19,777 | Missouri |
| Otsego | 19,691 | Minnesota |
| Onalaska | 19,483 | Wisconsin |
| Oxon Hill | 18,080 | Maryland |
| Ottawa | 17,951 | Illinois |
| Ocean Springs | 17,900 | Mississippi |
| Oak Grove | 17,872 | Oregon |
| Orange | 17,500 | Texas |
| Ocean Acres | 17,333 | New Jersey |
| Oconomowoc | 17,299 | Wisconsin |
| Oswego | 17,042 | New York |
| Ojus | 16,417 | Florida |
| Opelousas | 15,547 | Louisiana |
| Oldsmar | 15,527 | Florida |
| Opa-locka | 15,523 | Florida |
| Overland | 15,425 | Missouri |
| Ocean Pointe | 14,989 | Hawaii |
| Owosso | 14,373 | Michigan |
| Ozark | 14,194 | Alabama |
| Oatfield | 14,060 | Oregon |
| Olympia Heights | 13,958 | Florida |
| Orange | 13,934 | Connecticut |
| Oak Park | 13,853 | California |
| Oneonta | 13,765 | New York |
| Olivehurst | 13,464 | California |
| Olean | 13,161 | New York |
| Oakland | 12,846 | New Jersey |
| Orange City | 12,685 | Florida |
| Ocean Pines | 12,499 | Maryland |
| Orangeburg | 12,402 | South Carolina |
| Oak Hills | 12,308 | Oregon |
| Ottawa | 12,216 | Kansas |
| Overlea | 12,195 | Maryland |
| Okmulgee | 11,735 | Oklahoma |
| Oskaloosa | 11,622 | Iowa |
| Ontario | 10,972 | Oregon |
| Ocean City | 10,859 | New Jersey |
| Oak Grove | 10,835 | South Carolina |
| Oneida | 10,788 | New York |
| Oregon | 10,695 | Wisconsin |
| Oak Hills | 10,444 | California |
| Orange Cove | 10,247 | California |
| Ogdensburg | 10,186 | New York |