Biggest Cities Beginning With 'O'

Name the most populous cities in the world beginning with the letter 'O'.

*2021 Estimates

*City proper, not urban area

*English names

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Last updated: October 11, 2021

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First submitted	October 11, 2021
Times taken	50
Average score	21.1%
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Population	Country	City
2,592,413	Japan	Osaka
1,849,659	Sudan	Omdurman
1,475,223	Burkina Faso	Ouagadougou
1,129,281	Russia	Omsk
1,011,494	Ukraine	Odessa
934,243	Canada	Ottawa
803,329	Algeria	Oran
699,944	Brazil	Osasco
681,054	United States	Oklahoma City
639,652	Japan	Okayama
580,000	Norway	Oslo
577,307	Iran	Orūmīyeh
550,204	Russia	Orenburg
510,242	China	Ordos City
494,252	Morocco	Oujda
486,051	United States	Omaha
448,907	Japan	Ōita
440,646	United States	Oakland
393,115	Brazil	Olinda
369,894	Nigeria	Oyo
352,361	Japan	Okazaki
350,280	Nigeria	Onitsha
324,200	Russia	Orël
313,088	Czechia	Ostrava
312,775	NIgeria	Okene
307,573	United States	Orlando
302,643	Bolivia	Oruro
298,164	Japan	Ōtsu
255,029	Mexico	Oaxaca
246,836	Russia	Orsk
242,272	Mexico	Ojo de Agua
229,725	South Korea	Osan
224,005	Spain	Oviedo
223,648	Pakistan	Okara
221,178	Philippines	Olongapo
219,176	Germany	Oberhausen
206,614	Romania	Oradea
203,035	Japan	Odawara
202,837	Turkey	Osmaniye
202,063	United States	Oxnard
200,000	Kyrgyzstan	Osh
200,000	Kazakhstan	Oral
197,238	United States	Overland Park
191,200	Philippines	Ormoc
175,265	United States	Ontario
174,068	United States	Oceanside
173,890	Japan	Obihiro
173,410	Chile	Osorno
172,872	India	Ongole
171,803	Poland	Olsztyn
171,380	United Kingdom	Oxford
169,928	Algeria	Ouargla
166,462	Germany	Osnabrück
166,462	United States	Oakville
159,936	Japan	Oyama
159,218	Russia	Oldenburg
158,265	India	Orai
157,181	Nigeria	Owo
152,104	Japan	Ōta
150,570	Japan	Ōgaki
149,323	Japan	Ōme
145,931	Denmark	Odense
143,792	Japan	Otaru
141,290	United States	Olathe
139,911	United States	Orange
137,041	Russia	Odintsovo
131,974	Japan	Ōmuta
129,308	Colombia	Ocaña
128,618	Finland	Oulu
127,676	Poland	Opole
127,600	Venezuela	Ocumare del Tuy
125,483	Japan	Okinawa
125,347	Belarus	Orsha
124,149	France	Orléans
121,269	Chile	Ovalle
121,207	Uzbekistan	Olmaliq
120,844	Mexico	Orizaba
120,000	Russia	Orekhovo-Zuyevo
119,711	Nigeria	Owerri
119,192	Germany	Offenbach am Main
116,788	Turkey	Ordu
115,765	Sweden	Örebro
114,428	United States	Odessa
114,352	Brazil	Ourinhos
108,200	Russia	Oktyabrskiy
107,742	Spain	Ourense
107,392	Russia	Obninsk
104,782	United Kingdom	Oldham
103,000	Russia	Oleksandriya
101,268	Czechia	Olomouc

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