| Şehir | Eyalet, İl, Bölge |
|---|
| ›O Fallon | Missouri› |
| ›Oak Bluffs | Massachusetts› |
| ›Oak Creek | Wisconsin› |
| ›Oak Creek Village | Texas› |
| ›Oak Glen Place | Texas› |
| ›Oak Grove | Virginia› |
| ›Oak Grove | South Carolina› |
| ›Oak Harbor | Ohio› |
| ›Oak Harbor | Washington› |
| ›Oak Hill | Ohio› |
| ›Oak Hill Park | Massachusetts› |
| ›Oak HİLLS | California› |
| ›Oak Island | New York› |
| ›Oak Island | New York› |
| ›Oak Lawn | Illinois› |
| ›Oak Orchard | New York› |
| ›Oak Park Trails | Texas› |
| ›Oak Point | New York› |
| ›Oak Point | Texas› |
| ›Oak Ridge | Florida› |
| ›Oak Ridge | Tennessee› |
| ›Oak Ridge | Louisiana› |
| ›Oak View | California› |
| ›Oakalla | Texas› |
| ›Oakdale | New York› |
| ›Oakdale | California› |
| ›Oakdale | Louisiana› |
| ›Oakes | North Dakota› |
| ›Oakfield | New York› |
| ›Oakhurst | Texas› |
| ›Oakhurst | California› |
| ›Oakland | New Jersey› |
| ›Oakland | Vermont› |
| ›Oakland | Massachusetts› |
| ›Oakland | South Carolina› |
| ›Oakland | Maine› |
| ›Oakland | California› |
| ›Oakland City | Indiana› |
| ›Oakland Estates | Texas› |
| ›Oakland Park | Florida› |
| ›Oaklawn | Kansas› |
| ›Oakley | California› |
| ›Oakley | Idaho› |
| ›Oakridge | Oregon› |
| ›Oaks of Devonshire | Texas› |
| ›Oakton | Virginia› |
| ›Oakvale | New York› |
| ›Oakvale | West Virginia› |
| ›Oakville | Texas› |
| ›Oakville | Missouri› |
| ›Oakwood | Illinois› |
| ›Oatville | Kansas› |
| ›Oberlin | Ohio› |
| ›Obetz | Ohio› |
| ›Ocala | Florida› |
| ›Ocean Acres | New Jersey› |
| ›Ocean City | Florida› |
| ›Ocean City | New Jersey› |
| ›Ocean City | Maryland› |
| ›Ocean Park | Washington› |
| ›Ocean Ridge | Florida› |
| ›Ocean Shores | Washington› |
| ›Ocean View | Delaware› |
| ›Ocean View / Hawaii Island | Hawaii› |
| ›Oceano | California› |
| ›Oceanside | New York› |
| ›Oceanside | California› |
| ›Oconto | Wisconsin› |
| ›Odenton | Maryland› |
| ›Odessa | Texas› |
| ›Odessa | Delaware› |
| ›Oelwein | Iowa› |
| ›Ogallala | Nebraska› |
| ›Ogden | Utah› |
| ›Ogden Island | New York› |
| ›Ogdensburg | New York› |
| ›Ogdensburg Havaalanı | New York› |
| ›Ohio City | Ohio› |
| ›Ohiowa | Nebraska› |
| ›Oil City | Pennsylvania› |
| ›Oildale | California› |
| ›Ojai | California› |
| ›Okeechobee | Florida› |
| ›Oklahoma City | Oklahoma› |
| ›Okmulgee | Oklahoma› |
| ›Okobojo | South Dakota› |
| ›Olancha | California› |
| ›Olathe | Kansas› |
| ›Olcott | New York› |
| ›Old Bennington | Vermont› |
| ›Old Bethpage | New York› |
| ›Old Brookville | New York› |
| ›Old Dime Box | Texas› |
| ›Old Field | New York› |
| ›Old Fort | North Carolina› |
| ›Old Harbor | Alaska› |
| ›Old Ocean | Texas› |
| ›Old Rampart | Alaska› |
| ›Old River-Winfree | Texas› |
| ›Old Saybrook | Connecticut› |
| ›Old Tappan | New Jersey› |
| ›Old Town | Florida› |
| ›Old Town | Maine› |
| ›Old Westbury | New York› |
| ›Olde Oaks | Texas› |
| ›Olean | New York› |
| ›Olivehurst | California› |
| ›Olivet | Illinois› |
| ›Olivia | Texas› |
| ›Olivia | Minnesota› |
| ›Olmos Park | Texas› |
| ›Olmsted Falls | Ohio› |
| ›Olney | Illinois› |
| ›Olney | Maryland› |
| ›Olympia | Washington› |
| ›Olyphant | Pennsylvania› |
| ›Omaha | Nebraska› |
| ›Omak | Washington› |
| ›Omao / Kauai Island | Hawaii› |
| ›Omar | New York› |
| ›Omro | Wisconsin› |
| ›Onalaska | Texas› |
| ›Onalaska | Wisconsin› |
| ›Oneida | New York› |
| ›ONeill | Nebraska› |
| ›Onekama | Michigan› |
| ›Onekama | Michigan› |
| ›Oneonta | New York› |
| ›Onida | South Dakota› |
| ›Ontario | New York› |
| ›Ontario | California› |
| ›Ontario | Oregon› |
| ›Ontario Center | New York› |
| ›Ontonagon | Michigan› |
| ›Opelika | Texas› |
| ›Opelika | Alabama› |
| ›Opelousas | Louisiana› |
| ›Ophir | Oregon› |
| ›Opp | Alabama› |
| ›Oradell | New Jersey› |
| ›Orange | Massachusetts› |
| ›Orange | Virginia› |
| ›Orange | California› |
| ›Orange | Texas› |
| ›Orange City | Florida› |
| ›Orange Cove | California› |
| ›Orangeburg | South Carolina› |
| ›Orangeburg | New York› |
| ›Orchard | Nebraska› |
| ›Orchard Grove | Ohio› |
| ›Orchard Grove Village Park | New York› |
| ›Orcutt | California› |
| ›Ord | Nebraska› |
| ›Oregon | Ohio› |
| ›Oregon | Illinois› |
| ›Oregon City | Oregon› |
| ›Orem | Utah› |
| ›Orick | California› |
| ›Orient | New York› |
| ›Orla | Texas› |
| ›Orland | California› |
| ›Orland Park | Illinois› |
| ›Orlando | Florida› |
| ›Orleans | Massachusetts› |
| ›Ormond Beach | Florida› |
| ›Orovada | Nevada› |
| ›Oroville | California› |
| ›Oroville | Washington› |
| ›Oroville East | California› |
| ›Orwell | Vermont› |
| ›Osceola | Nebraska› |
| ›Osceola | Iowa› |
| ›Oshkosh | Wisconsin› |
| ›Oshkosh | Nebraska› |
| ›Oskaloosa | Iowa› |
| ›Oswegatchie | New York› |
| ›Oswego | New York› |
| ›Oswego Center | New York› |
| ›Oswego County Havaalanı | New York› |
| ›Otego | New York› |
| ›Othello | Washington› |
| ›Ottawa | Kansas› |
| ›Ottawa | Ohio› |
| ›Ottawa | Illinois› |
| ›Otter Rocks | Connecticut› |
| ›Ottumwa | Iowa› |
| ›Overbrook | Massachusetts› |
| ›Overgaard | Arizona› |
| ›Overland Park | Kansas› |
| ›Oviedo | Florida› |
| ›Owatonna | Minnesota› |
| ›Owego | New York› |
| ›Owensboro | Kentucky› |
| ›Owosso | Michigan› |
| ›Owyhee | Oregon› |
| ›Oxford | Massachusetts› |
| ›Oxford | Alabama› |
| ›Oxford | New York› |
| ›Oxford | Ohio› |
| ›Oxford (Amite County) | Mississippi› |
| ›Oxford (Lafayette County) | Mississippi› |
| ›Oxnard | California› |
| ›Oyster Bay | New York› |
| ›Oyster Bay Cove | New York› |
| ›Oyster Creek | Texas› |
| ›Ozark | Alabama› |
| ›Ozona | Texas› |
