Counties quiz
U.S. Counties Quiz
Free U.S. counties quiz and county trivia practice. Identify major counties from population, county seat, and region clues across America on US5 Games.
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Which county is near the marker?
Texas
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.
Parishes, boroughs, and independent city anomalies
While 48 states use the standard county designation, regional governance models introduce important geographic distinctions. Louisiana divides its territory into 64 Parishes (derived from historical French and Spanish colonial Catholic parish boundaries), while Alaska utilizes 19 organized Boroughs alongside an expansive Unorganized Borough.
Virginia presents another unique structure: 38 independent cities (including Alexandria, Richmond, and Virginia Beach) that operate completely separate from any county jurisdiction, functioning as county-equivalents under federal Census standards.
Why county-level tax, school, and housing data matters
In American local governance, property taxes, public school funding formulas, sheriff departments, and court systems are predominantly organized at the county level rather than the municipal level.
Understanding county geography provides critical clarity when comparing living costs between neighboring jurisdictions — such as crossing from high-tax Cook County, Illinois into Lake County, Indiana, or evaluating property assessments between California's Bay Area counties.
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.
| Rank | County | State | Seat | Population |
|---|---|---|---|---|
| 1 | Los Angeles County | California | Los Angeles | 9,694,934 |
| 2 | Cook County | Illinois | Chicago | 5,194,625 |
| 3 | Harris County | Texas | Houston | 5,045,026 |
| 4 | Maricopa County | Arizona | Phoenix | 4,689,558 |
| 5 | San Diego County | California | San Diego | 3,282,248 |
| 6 | Orange County | California | Santa Ana | 3,149,507 |
| 7 | Miami-Dade County | Florida | Miami | 2,802,029 |
| 8 | Dallas County | Texas | Dallas | 2,661,397 |
| 9 | Kings County | New York | Brooklyn | 2,653,963 |
| 10 | Riverside County | California | Riverside | 2,544,916 |
| 11 | Clark County | Nevada | Las Vegas | 2,407,226 |
| 12 | Queens County | New York | Queens | 2,358,182 |
| 13 | King County | Washington | Seattle | 2,344,939 |
| 14 | Tarrant County | Texas | Fort Worth | 2,248,466 |
| 15 | San Bernardino County | California | San Bernardino | 2,178,740 |
| 16 | Bexar County | Texas | San Antonio | 2,160,088 |
| 17 | Broward County | Florida | Fort Lauderdale | 2,013,317 |
| 18 | Santa Clara County | California | San Jose | 1,914,391 |
| 19 | Wayne County | Michigan | Detroit | 1,769,038 |
| 20 | Middlesex County | Massachusetts | Cambridge | 1,669,979 |
| 21 | New York County | New York | Manhattan | 1,664,862 |
| 22 | Alameda County | California | Oakland | 1,636,630 |
| 23 | Sacramento County | California | Sacramento | 1,618,460 |
| 24 | Palm Beach County | Florida | West Palm Beach | 1,575,726 |
| 25 | Philadelphia County | Pennsylvania | Philadelphia | 1,574,281 |
| 26 | Hillsborough County | Florida | Tampa | 1,574,115 |
| 27 | Suffolk County | New York | Riverhead | 1,546,090 |
| 28 | Orange County | Florida | Orlando | 1,421,526 |
| 29 | Bronx County | New York | The Bronx | 1,406,332 |
| 30 | Travis County | Texas | Austin | 1,389,670 |
Explore on US5
Games teach recognition. These Places and reference pages add cost, salary, and map context.
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