Biggest Cities Starting with O by Country

Can you name the most populated urban settlement starting with O in each country on the world map?

Sources: citypopulation.de, Wikipedia. Not including places with no official population data

For the purposes of this quiz, islands are considered settlements in Kiribati, atolls are considered settlements in Marshall Islands and Tuvalu, districts are considered settlements in Nauru

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Last updated: February 9, 2021

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First submitted	February 9, 2021
Times taken	122
Average score	11.6%
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Country	City	Population
Afghanistan	none	N/A
Albania	Orikum	5,503
Algeria	Oran	803,329
Andorra	Ordino	3,034
Angola	Ondjiva	121,537
Antigua and Barbuda	Old Road	1,093
Argentina	Olavarría	95,900
Armenia	none	N/A
Australia	Orange	40,804
Austria	Oberwart	7,064
Azerbaijan	Ordubad	10,372
Bahamas	none	N/A
Bahrain	none	N/A
Bangladesh	none	N/A
Barbados	Oistins	1,203
Belarus	Orsha	108,100
Belgium	Ostend	71,647
Belize	Orange Walk	13,665
Benin	Ouidah	47,616
Bhutan	none	N/A
Bolivia	Oruro	264,943
Bosnia and Herzegovina	Orašje	3,614
Botswana	Orapa	9,600
Brazil	Osasco	699,940
Brunei	none	N/A
Bulgaria	Omurtag	8,612
Burkina Faso	Ouagadougou	2,453,496
Burundi	none	N/A
Cambodia	Oudong	7,655
Cameroon	Obala	29,054
Canada	Ottawa	989,567
Cape Verde	none	N/A
Central African Republic	Obo	7,187
Chad	Oum Hadjer	26,552
Chile	Osorno	147,826
China	Ordos	496,100
Colombia	Ocaña	116,200
Comoros	Ouani	8,841
Costa Rica	Orotina	8,640
Croatia	Osijek	84,104
Cuba	none	N/A
Cyprus	Omorfita	10,856
Czech Republic	Ostrava	287,968
D. R. Congo	Oicha	43,065
Denmark	Odense	180,302
Djibouti	Obock	11,706
Dominica	none	N/A
Dominican Republic	Oviedo	10,986
East Timor	Ossu	4,263
Ecuador	Otavalo	39,354
Egypt	Obour	250,000
El Salvador	Opico	44,986
Equatorial Guinea	none	N/A
Eritrea	Omhajer	9,240
Estonia	Otepää	2,105
Eswatini	none	N/A
Ethiopia	none	N/A
F. S. Micronesia	Oneop	505
Fiji	none	N/A
Finland	Oulu	205,137
France	Orléans	116,238
Gabon	Owendo	79,300
Gambia	Old Jeshwang	7,552
Georgia	Ozurgeti	14,372
Germany	Oberhausen	210,764
Ghana	Obuasi	143,644
Greece	Oraiokastro	20,852
Grenada	none	N/A
Guatemala	Olintepeque	31,545
Guinea	none	N/A
Guinea-Bissau	none	N/A
Guyana	Orealla	981
Haiti	Ouanaminthe	58,250
Honduras	Olanchito	45,270
Hungary	Ózd	32,214
Iceland	Ólafsvík	995
India	Ongole	208,344
Indonesia	Oksibil	4,087
Iran	Omidiyeh	67,427
Iraq	none	N/A
Ireland	Oranmore	4,990
Israel	Or Yehuda	36,813
Italy	Olbia	60,154
Ivory Coast	Oumé	45,210
Jamaica	Old Harbour	28,912
Japan	Osaka	2,725,006
Jordan	none	N/A
Kazakhstan	Oskemen	333,178
Kenya	Ongata Rongai	172,569
Kiribati	Onotoa	1,393
Kosovo	Obilić	6,864
Kuwait	none	N/A
Kyrgyzstan	Osh	283,253
Laos	none	N/A
Latvia	Ogre	23,273
Lebanon	none	N/A
Lesotho	none	N/A
Liberia	none	N/A

Country	City	Population
Libya	none	N/A
Liechtenstein	none	N/A
Lithuania	Obeliai	782
Luxembourg	none	N/A
Madagascar	Onjatsy	8,000
Malawi	none	N/A
Malaysia	none	N/A
Maldives	none	N/A
Mali	Ouélessébougou	50,056
Malta	none	N/A
Marshall Islands	none	N/A
Mauritania	Ouad Naga	4,179
Mauritius	none	N/A
Mexico	Ojo de Agua	386,290
Moldova	Orhei	21,065
Monaco	none	N/A
Mongolia	Ölgij	36,930
Montenegro	Ozrinići	2,057
Morocco	Oujda	494,252
Mozambique	none	N/A
Myanmar	Oktwin	14,143
Namibia	Oshakati	36,541
Nauru	none	N/A
Nepal	none	N/A
Netherlands	Oss	56,930
New Zealand	Oamaru	13,700
Nicaragua	Ocotal	46,308
Niger	Ouallam	10,594
Nigeria	Ogbomosho	433,030
North Korea	none	N/A
North Macedonia	Ohrid	38,840
Norway	Oslo	693,494
Oman	none	N/A
Pakistan	Okara	357,935
Palau	none	N/A
Panama	Ocú	7,006
Papua New Guinea	Olsobip	1,000
Paraguay	Obligado	11,441
Peru	Olmos	16,900
Philippines	Olongapo	310,394
Poland	Olsztyn	171,979
Portugal	Odivelas	56,847
Qatar	none	N/A
Republic of the Congo	Ouesso	28,179
Romania	Oradea	196,367
Russia	Omsk	1,154,507
Rwanda	none	N/A
Saint Kitts and Nevis	none	N/A
Saint Lucia	none	N/A
Saint Vincent	none	N/A
Samoa	none	N/A
San Marino	none	N/A
Sao Tome and Principe	Ototó	585
Saudi Arabia	none	N/A
Senegal	Ouro Sogui	15,654
Serbia	Obrenovac	25,429
Seychelles	none	N/A
Sierra Leone	none	N/A
Singapore	none	N/A
Slovakia	none	N/A
Slovenia	Ormož	2,102
Solomon Islands	none	N/A
Somalia	Oog	45,012
South Africa	Orkney	91,854
South Korea	Osan	236,075
South Sudan	none	N/A
Spain	Oviedo	219,910
Sri Lanka	none	N/A
Sudan	Omdurman	1,849,659
Suriname	Oostelijke Polders	7,153
Sweden	Örebro	125,817
Switzerland	Opfikon	21,014
Syria	none	N/A
Taiwan	none	N/A
Tajikistan	Obikiik	12,300
Tanzania	Orkesumet	5,325
Thailand	Om Noi	53,978
Togo	none	N/A
Tonga	Ohonua	1,438
Trinidad and Tobago	Ortoire	764
Tunisia	Oued Ellil	57,851
Turkey	Osmaniye	237,476
Turkmenistan	none	N/A
Tuvalu	none	N/A
Uganda	Omoro	23,200
Ukraine	Odessa	1,017,699
United Arab Emirates	none	N/A
United Kingdom	Oxford	162,291
United States	Oklahoma City	655,057
Uruguay	Ombúes de Lavalle	3,390
Uzbekistan	Oqtosh	34,300
Vanuatu	none	N/A
Vatican City	none	N/A
Venezuela	Ocumare del Tuy	127,600
Vietnam	none	N/A
Yemen	none	N/A
Zambia	none	N/A
Zimbabwe	Odzi	3,438

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