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Most Populous U.S. Counties A-Z

Can you name the most populous U.S. counties for each letter?
Population numbers are from the 2020 U.S. Census.
Quiz by geographynerd
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Last updated: February 7, 2024
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First submittedFebruary 7, 2024
Times taken18
Average score72.0%
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Pop. (2020)
State
County
A
1,682,353
California
Alameda
B
2,009,324
Texas
Bexar
C
5,275,541
Illinois
Cook
D
2,613,539
Texas
Dallas
E
954,236
New York
Erie
F
1,323,807
Ohio
Franklin
G
942,627
Georgia
Gwinnett
H
4,731,145
Texas
Harris
I
284,900
Michigan
Ingham
J
782,969
Kentucky
Jefferson
K
2,736,074
New York
Kings
L
10,014,009
California
Los Angeles
M
4,420,568
Arizona
Maricopa
 
Pop. (2020)
State
County
N
1,694,250
New York
New York
O
3,186,989
California
Orange
P
1,603,797
Pennsylvania
Philadelphia
Q
2,405,464
New York
Queens
R
2,418,185
California
Riverside
S
3,298,634
California
San Diego
T
2,110,640
Texas
Tarrant
U
659,399
Utah
Utah
V
843,843
California
Ventura
W
1,793,561
Michigan
Wayne
X
none
Y
456,438
Pennsylvania
York
Z
13,889
Texas
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