The World - Top 100+ Cities by Population
Population data by city is the population of the city itself, not the metro area (for specific metro area data, see our ranking by metro area). Data is as of 2011 estimates.
| Rank | City | Country | Population | |
|---|---|---|---|---|
| 56,839. | Oniceni | Romania | 3,284 | |
| 94,172. | Onida | United States | 658 | |
| 35,519. | Onil | Spain | 7,474 | |
| 70,728. | Onion Creek | United States | 2,116 | |
| 658. | Onitsha | Nigeria | 561,066 | |
| 32,383. | Onnaing | France | 8,703 | |
| 83,367. | Önnestad | Sweden | 1,366 | |
| 14,632. | Ōno | Japan | 26,190 | |
| 10,767. | Ono | Japan | 37,469 | |
| 8,342. | Ono | Japan | 50,230 | |
| 65,829. | Ónod | Hungary | 2,461 | |
| 9,309. | Onoda | Japan | 44,295 | |
| 4,315. | Ōnojō | Japan | 94,957 | |
| 59,585. | Onokhino | Russia | 3,012 | |
| 28,827. | Onokhoy | Russia | 10,478 | |
| 4,512. | Onomichi | Japan | 90,936 | |
| 83,862. | Ons-en-Bray | France | 1,340 | |
| 24,475. | Onsala | Sweden | 13,370 | |
| 96,906. | Onsdorf | Germany | 151 | |
| 79,269. | Onset | United States | 1,573 | |
| 18,339. | Onsŏng | North Korea | 19,806 | |
| 70,061. | Ontario | United States | 2,160 | |
| 39,508. | Ontario | United States | 6,225 | |
| 27,335. | Ontario | United States | 11,366 | |
| 2,446. | Ontario | United States | 163,924 | |
| 73,009. | Ontígola | Spain | 1,965 | |
| 10,699. | Ontinyent | Spain | 37,735 | |
| 80,751. | Ontonagon | United States | 1,494 | |
| 66,190. | Ontur | Spain | 2,431 | |
| 49,050. | Onufriyivka | Ukraine | 4,298 | |
| 70,887. | Onverwacht | Suriname | 2,105 | |
| 82,821. | Onzaga | Colombia | 1,393 | |
| 56,207. | Onzain | France | 3,354 | |
| 79,389. | Onzonilla | Spain | 1,566 | |
| 42,564. | Oodweyne | Somalia | 5,491 | |
| 87,577. | Oolitic | United States | 1,184 | |
| 88,553. | Oologah | United States | 1,146 | |
| 90,641. | Oost-Vlieland | Netherlands | 1,070 | |
| 60,945. | Oostburg | United States | 2,887 | |
| 77,039. | Oostelbeers | Netherlands | 1,700 | |
| 6,057. | Oostende | Belgium | 69,011 | |
| 27,710. | Oosterbeek | Netherlands | 11,138 | |
| 67,402. | Oosterhout | Netherlands | 2,340 | |
| 7,941. | Oosterhout | Netherlands | 53,107 | |
| 28,717. | Oosterpark | Netherlands | 10,550 | |
| 24,732. | Oosterzele | Belgium | 13,151 | |
| 17,197. | Oostkamp | Belgium | 21,489 | |
| 35,472. | Oostrozebeke | Belgium | 7,489 | |
| 22,304. | Opa-locka | United States | 15,219 | |
| 59,680. | Opaka | Bulgaria | 3,002 | |
| 40,976. | Opal Cliffs | United States | 5,846 | |
| 31,760. | Opalenica | Poland | 8,991 | |
| 44,548. | Opalikha | Russia | 5,081 | |
| 59,333. | Ópályi | Hungary | 3,035 | |
| 83,372. | Opařany | Czech Republic | 1,365 | |
| 45,124. | Oparino | Russia | 4,986 | |
| 34,341. | Opatija | Croatia | 7,888 | |
| 89,139. | Opatov | Czech Republic | 1,124 | |
| 69,147. | Opatovice nad Labem | Czech Republic | 2,218 | |
| 87,170. | Opatów | Poland | 1,200 | |
| 86,774. | Opatów | Poland | 1,213 | |
| 37,590. | Opatów | Poland | 6,799 | |
| 52,532. | Opatówek | Poland | 3,800 | |
| 95,466. | Opatowiec | Poland | 410 | |
| 7,009. | Opava | Czech Republic | 60,252 | |
| 73,613. | Opechenskiy Posad | Russia | 1,924 | |
| 76,877. | Opeinde | Netherlands | 1,710 | |
| 14,474. | Opelika | United States | 26,477 | |
| 20,943. | Opelousas | United States | 16,634 | |
| 24,472. | Opera | Italy | 13,373 | |
| 68,529. | Opfenbach | Germany | 2,260 | |
| 85,335. | Opfikon | Switzerland | 1,277 | |
| 67,808. | Öpfingen | Germany | 2,312 | |
| 30,795. | Opglabbeek | Belgium | 9,452 | |
| 27,539. | Opi | Nigeria | 11,237 | |
| 49,267. | Opichén | Mexico | 4,265 | |
| 94,309. | Opinogóra Górna | Poland | 630 | |
| 70,910. | Opio | France | 2,103 | |
| 16,279. | Opladen | Germany | 23,000 | |
| 83,869. | Oplotnica | Slovenia | 1,340 | |
| 27,632. | Opmeer | Netherlands | 11,183 | |
| 24,238. | Opochka | Russia | 13,548 | |
| 57,802. | Opočno | Czech Republic | 3,177 | |
| 16,528. | Opoczno | Poland | 22,592 | |
| 55,202. | Opol | Philippines | 3,468 | |
| 3,158. | Opole | Poland | 127,676 | |
| 32,215. | Opole Lubelskie | Poland | 8,780 | |
| 32,603. | Opopeo | Mexico | 8,601 | |
| 67,840. | Oporapa | Colombia | 2,310 | |
| 85,591. | Oporelu | Romania | 1,265 | |
| 96,171. | Oporów | Poland | 280 | |
| 40,358. | Oposhnya | Ukraine | 6,003 | |
| 50,776. | Opotiki | New Zealand | 4,044 | |
| 46,244. | Opovo | Serbia | 4,769 | |
| 38,032. | Opp | United States | 6,659 | |
| 59,056. | Oppach | Germany | 3,060 | |
| 53,297. | Oppdal | Norway | 3,706 | |
| 35,380. | Oppeano | Italy | 7,514 | |
| 84,397. | Oppède | France | 1,314 | |
| 45,183. | Oppenau | Germany | 4,973 |
