Biggest U.S. Cities Starting with O

Try to name the most populous cities in the United States that start with the letter O.
Cities proper, not metro areas
2024 U.S. Census estimates
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Last updated: May 17, 2025
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First submittedFebruary 9, 2012
Times taken33,754
Average score47.1%
Rating4.39
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Population
State
Hint
City
712,919
Oklahoma
State capital
Oklahoma City
489,265
Nebraska
Warren Buffett lives here
Omaha
443,554
California
Former home of the Raiders
Oakland
334,854
Florida
Nearest major city to Disney World
Orlando
202,893
Kansas
Kansas City suburb
Overland Park
200,616
California
Largest city in Ventura County
Oxnard
185,285
California
Not to be confused with a Canadian province
Ontario
170,941
California
Literally, along the sea
Oceanside
149,035
Kansas
Kansas City suburb
Olathe
137,941
California
SoCal city which shares its name with its county
Orange
119,748
Texas
Where "Friday Night Lights" took place. Also, a city in Ukraine.
Odessa
96,646
Utah
Provo neighbor
Orem
95,355
Missouri
Has an apostrophe in its name
O'Fallon
88,656
Utah
Near the Golden Spike
Ogden
70,251
Florida
Known for thoroughbred horse farms
Ocala
67,242
Wisconsin
Namesake of the children's clothing maker ______ B'Gosh
Oshkosh
60,675
Kentucky
Johnny Depp's hometown
Owensboro
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14 Comments
+8
Level 68
Jul 6, 2019
How did so many people get Orlando without having to get Orland Park on accident first?
+1
Level 85
Jan 28, 2022
Maybe you used to have to type "park" as well and the quiz was updated?
+5
Level ∞
May 29, 2022
Removed Orland Park since it was the least populous answer and also very unessential.
+1
Level 75
Jul 5, 2023
Too bad, now its an uneven number of answers
+1
Level 83
Dec 21, 2025
Could easily add Olympia to even it up. Or Ocean City for a bigger challenge.
+2
Level 65
Oct 7, 2022
Great to see O'Fallon get a mention on here! There's another one in bordering Illinois founded by the same person. Both cities are part of the St. Louis metropolitan area.
+3
Level 62
Oct 11, 2022
Enjoyed the quiz, thanks. Although you missed your chance to be extra clever and say "Littorally, along the sea"!
+2
Level 86
Jun 4, 2025
How splendid !
+2
Level 54
Feb 28, 2024
I like Nukes
+1
Level 48
Feb 26, 2025
Nice
+1
Level 38
Jul 22, 2025
You like what?????
+2
Level 60
Dec 21, 2025
Some of these places are not real bro. O'Fallon, Missouri?? You expect me to believe that? Stop it.
+2
Level 66
Dec 21, 2025
I can't tell if you're joking
+2
Level 64
Dec 21, 2025
This is a joke, right? It's just outside St. Louis (and there's another O'Fallon on the Illinois side).