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Counties quiz

U.S. Counties Quiz

Free U.S. counties quiz and county quiz practice. Identify major counties from population, seat, and region clues.

1/10

Score 0/0

Which county is near the marker?

Virginia

How to play

Identify major U.S. counties from population, seat, and regional clues — a US counties quiz / county quiz for the middle geography between states and ZIPs.

Counties vs cities vs ZIPs

A city can span counties; a county can contain many cities and ZIPs. Los Angeles County is not the same entity as the City of Los Angeles. Quizzes that only teach state capitals miss this layer entirely.

Looking for largest U.S. counties as a study list? Scroll to the Top counties table on this page for teaching populations and seats, then open US5 `/county` hubs when you want full Places demographics.

Largest U.S. counties — Top 30 (teaching populations)

County populations from the games teaching bank for the counties quiz. Open US5 county hubs for Places demographics.

RankCountyStateSeatPopulation
1Los Angeles CountyCaliforniaLos Angeles9,694,934
2Cook CountyIllinoisChicago5,194,625
3Harris CountyTexasHouston5,045,026
4Maricopa CountyArizonaPhoenix4,689,558
5San Diego CountyCaliforniaSan Diego3,282,248
6Orange CountyCaliforniaSanta Ana3,149,507
7Miami-Dade CountyFloridaMiami2,802,029
8Dallas CountyTexasDallas2,661,397
9Kings CountyNew YorkBrooklyn2,653,963
10Riverside CountyCaliforniaRiverside2,544,916
11Clark CountyNevadaLas Vegas2,407,226
12Queens CountyNew YorkQueens2,358,182
13King CountyWashingtonSeattle2,344,939
14Tarrant CountyTexasFort Worth2,248,466
15Bexar CountyTexasSan Antonio2,160,088
16Broward CountyFloridaFort Lauderdale2,013,317
17Santa Clara CountyCaliforniaSan Jose1,914,391
18Wayne CountyMichiganDetroit1,769,038
19Middlesex CountyMassachusettsCambridge1,669,979
20New York CountyNew YorkManhattan1,664,862
21Alameda CountyCaliforniaOakland1,636,630
22Sacramento CountyCaliforniaSacramento1,618,460
23Palm Beach CountyFloridaWest Palm Beach1,575,726
24Philadelphia CountyPennsylvaniaPhiladelphia1,574,281
25Hillsborough CountyFloridaTampa1,574,115
26Suffolk CountyNew YorkRiverhead1,546,090
27Bronx CountyNew YorkThe Bronx1,406,332
28Travis CountyTexasAustin1,389,670
29Franklin CountyOhioColumbus1,361,536
30Hennepin CountyMinnesotaMinneapolis1,284,784

Explore on US5

Games teach recognition. These Places and reference pages add cost, salary, and map context.

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Frequently asked questions

Where is the largest-us-counties study page?
On this page: the “Largest U.S. counties” reference table below the quiz lists the top counties by teaching population, with seats and state links. For deeper ZIP demographics, open the matching US5 county hubs.
Are independent cities included?
The quiz highlights widely referenced counties. Independent cities and parish/borough naming differences are covered more carefully on Places county pages.
How is the counties quiz scored?
One point per correct county out of ten rounds. Share copies an emoji grid of right and wrong answers.
Is this official government data?
No. Games are educational practice tools. For decision data — cost of living, salary, ZIP demographics — use US5 Places, Cost, and Money pages, which cite Census / HUD-style sources.