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100 Cities by Letter - O

Based on the clue, can you guess these cities whose names start in the letter O.
Many of these are technically villages, towns, boroughs, or unincorporated
Ö is treated as a variant of O for the purposes of this quiz
Quiz by
Aaron197
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Last updated: August 4, 2025
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First submittedJuly 28, 2025
Times taken1,732
Average score30.0%
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Hint
City
Capital of Canada
Ottawa
Oldest university city in England
Oxford
Site of 1993 Israel/PLO accords
Oslo
Principal city of the Keihanshin
Osaka
City in Lower Saxony with a
historical influential royal family
Oldenburg
City near Disney World
Orlando
Algeria's second-largest city
Oran
Capital of Washington
Olympia
Three-letter city of Kyrgyzstan
Osh
"Oregonian" city that was the first west
of the Rockies to be incorporated
Oregon City
Its NBA team is called "Thunder"
Oklahoma City
Tennessean city founded as a
secret nuclear research site
Oak Ridge
Mexican city famous for mole sauce
Oaxaca
Capital of Burkina Faso
Ouagadougou
Warren Buffett is this city's "Oracle"
Omaha
Most populous suburb of the
Frankfurt metro area
Offenbach
am Main
SoCal city or the county it is in
Orange
Biggest city in northern Finland
Oulu
Japanese city or a U.S. president
Obama
Bolivian city inside the Altiplano
Oruro
Missourian city or the range it is in
Ozark
Also a prefecture in southwest Honshu
Okayama
Biggest city in the Czech Silesia
Ostrava
Sudan's largest city by city proper
Omdurman
Nigerian city of 1 million people
Onitsha
Jamaican tourist resort whose name
is Spanish for "Eight Rivers"
Ocho Rios
Major city in Inner Mongolia, China
Ordos
Polish WWII concentration camp site
Oświęcim
Czech city whose Holy Trinity Column
is a UNESCO heritage site
Olomouc
North Macedonian lake town
Ohrid
Swedish city founded by King Oscar I
Oskarshamn
"Seaside" resort at the northern end
of the San Diego metro area
Oceanside
Largest suburb of St. Louis
O'Fallon
Moroccan city on the Algerian border
Oujda
California's 1960 Winter Olympics
Olympic Valley
Iconic village on Santorini
Oia
Historical capital of Upper Silesia
Opole
The first Winter Paralympic Games
host was this city in northern Sweden
Örnsköldsvik
Long Island town of Teddy Roosevelt's
"summer" White House
Oyster Bay
Site of a mass execution of
political prisoners in 1941 in Russia
Oryol
Chilean gateway to its far south
Osorno
Also the name of Florida's largest lake
Okeechobee
A lighthouse in this city marks the
easternmost point on Italian mainland
Otranto
"Hollywood of Morocco"
Ouarzazate
Art Nouveau center of Romania
Oradea
Portugal's largest municipality by area
Odemira
Largest Mexican non-municipal seat
locality or Spanish for "eye of water"
Ojo de Agua
Russian city on the Ural River
near the Kazakh border
Orsk
Swiss town that is a major rail hub
between Zurich, Basel and Bern
Olten
Home to Germany's NATO School
Oberammergau
Hint
City
Ukrainian seaport
Odessa
Four-letter major Russian city
Omsk
Capital of Asturias, Spain
Oviedo
Located near Naha
Okinawa
Across the bay from San Francisco
Oakland
City in the Ruhr area between
Duisburg and Essen
Oberhausen
Joan of Arc was its "Maid"
Orléans
Californian city / Canadian province
Ontario
Capital of Sint Eustatius or Aruba
Oranjestad
Capital of West Kazakhstan
Oral
Gold mining town in South Africa
named for a Scottish archipelago
Orkney
Hans Christian Andersen's hometown
Odense
Belgian seaside city
Ostend
This South African town is dubbed
"the ostrich capital of the world"
Oudtshoorn
Cities in the Greater Toronto Area
Oakville
Oshawa
Headquarters of Sprint in Kansas
Overland Park
Main city of Närke, Sweden
Örebro
Major Manchester suburb
Oldham
Johnny Depp's hometown
Owensboro
Gave its name to a major Paris airport
Orly
Kyushu prefecture namesake
Ōita
White-separatist town in South Africa
Orania
City in upstate New York with
namesake of the state's largest lake
Oneida
Most populous city on
California's Central Coast
Oxnard
Russia's unofficial "Asian capital"
Orenburg
Utahn city near the Golden Spike
Ogden
Latvian city or Shrek's species
Ogre
Mexico's highest peak namesake
Orizaba
Russian locality with namesake of a
sea between Sakhalin and Kamchatka
Okhotsk
Largest city in Slavonia, Croatia
Osijek
Sing Sing prison in New York
Ossining
Where the treaty that ended the
Thirty Years' War was signed
Osnabrück
Ohioan city of a liberal arts college
Oberlin
Seats and namesakes of two
Turkish provinces
Ordu
Osmaniye
Utah Valley University locale
Orem
Main city of Jämtland, Sweden
Östersund
Major city on Filipino island Leyte
Ormoc
Easternmost city in Maryland
Ocean City
Delta city on the White Sea with
namesake of a major Russian lake
Onega
Namesake of the children's
clothing maker: ______ B'Gosh
Oshkosh
"Abad" in Maharashtra named for
an Indian ruler, not an Ottoman sultan
Osmanabad
Capital of Warmia–Masuria, Poland
Olsztyn
Capital of Shiga, Japan
Ōtsu
English town whose nuclear reactors
were shut down in 2012
Oldbury
Colonial city in Recife Metro Area
Olinda
Japan's first shōgun was born in the
castle of this city in Chūbu
Okazaki
Swedish city located at almost the
southernmost tip of Södermanland
Oxelösund
Where the IS massacred 40 people
in a Catholic church in Nigeria in 2022
Owo
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4 Comments
Zefyrinus
+1
Level 74
Jul 29, 2025
A couple of minutes more time please!
Alexquiz17
+1
Level 95
Aug 2, 2025
Wow, can’t believe you made a whole series of these. That’s my next fortnight taken care of!
wintergreen
+1
Level 69
Dec 8, 2025
Oświęcim was a site of German WWII concentration camp located in conquered Poland. It makes a bit difference if you build and maintain a concentration camp or you are its prisoner.
Nestormakhno
+1
Level 79
May 21, 2026
HQ of sprint question might need changing considering it doesn’t even exist anymore lol
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