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Most Populous US Counties by Decade (1890-1980)

Name the top 10 most populous US counties for each decade between 1890 and 1980, according to Imperial Statistics.
Exact Video: "Top 50 U.S Countries by Population", Uploaded: May 13th, 2026
M stands for million(s)
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DrewFan
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Last updated: May 14, 2026
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First submittedMay 13, 2026
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Year
Rank
Population
Answer
1890
1.
1.52 M
New York County
 
2.
1.19 M
Cook
 
3.
1.05 M
Philadelphia
 
4.
838,553
Kings
 
5.
551,963
Allegheny
 
6.
484,782
Suffolk
 
7.
451,772
St. Louis city
 
8.
434,440
Baltimore city
 
9.
431,170
Middlesex
 
10.
374,574
Hamilton
1900
1.
2.05 M
New York County
 
2.
1.84 M
Cook
 
3.
1.3 M
Philadelphia
 
4.
1.17 M
Kings
 
5.
775,728
Allegheny
 
6.
612,240
Suffolk
 
7.
575,005
St. Louis city
 
8.
566,411
Middlesex
 
9.
509,297
Baltimore city
 
10.
440,480
Cuyahoga
1910
1.
2.76 M
New York County
 
2.
2.4 M
Cook
 
3.
1.63 M
Kings
 
4.
1.55 M
Philadelphia
 
5.
1.02 M
Allegheny
 
6.
730,365
Suffolk
 
7.
688,076
St. Louis city
 
8.
669,027
Middlesex
 
9.
635,735
Cuyahoga
 
10.
558,063
Baltimore city
1920
1.
3.04 M
Cook
 
2.
2.29 M
New York County
 
3.
2.01 M
Kings
 
4.
1.82 M
Philadelphia
 
5.
1.18 M
Allegheny
 
6.
1.17 M
Wayne
 
7.
938,271
Cuyahoga
 
8.
833,745
Los Angeles
 
9.
833,745
Middlesex
 
10.
776,501
Suffolk
1930
1.
3.98 M
Cook
 
2.
2.56 M
Kings
 
3.
2.21 M
Los Angeles
 
4.
1.95 M
Philadelphia
 
5.
1.89 M
Wayne
 
6.
1.87 M
New York County
 
7.
1.37 M
Allegheny
 
8.
1.27 M
Bronx
 
9.
1.2 M
Cuyahoga
 
10.
1.08 M
Queens
1940
1.
4.06 M
Cook
 
2.
2.77 M
Los Angeles
 
3.
2.7 M
Kings
 
4.
2.01 M
Wayne
 
5.
1.93 M
Philadelphia
 
6.
1.89 M
New York County
 
7.
1.41 M
Allegheny
 
8.
1.39 M
Bronx
 
9.
1.29 M
Queens
 
10.
1.22 M
Cuyahoga
1950
1.
4.5 M
Cook
 
2.
4.12 M
Los Angeles
 
3.
2.74 M
Kings
 
4.
2.43 M
Wayne
 
5.
2.07 M
Philadelphia
 
6.
1.96 M
New York County
 
7.
1.55 M
Queens
 
8.
1.51 M
Allegheny
 
9.
1.45 M
Bronx
 
10.
1.39 M
Cuyahoga
1960
1.
6.01 M
Los Angeles
 
2.
5.12 M
Cook
 
3.
2.66 M
Wayne
 
4.
2.63 M
Kings
 
5.
2 M
Philadelphia
 
6.
1.81 M
Queens
 
7.
1.7 M
New York County
 
8.
1.64 M
Cuyahoga
 
9.
1.63 M
Allegheny
 
10.
1.43 M
Bronx
1970
1.
7.03 M
Los Angeles
 
2.
5.49 M
Cook
 
3.
2.67 M
Wayne
 
4.
2.6 M
Kings
 
5.
1.99 M
Queens
 
6.
1.95 M
Philadelphia
 
7.
1.74 M
Harris
 
8.
1.72 M
Cuyahoga
 
9.
1.6 M
Allegheny
 
10.
1.54 M
New York County
1980
1.
7.47 M
Los Angeles
 
2.
5.26 M
Cook
 
3.
2.4 M
Harris
 
4.
2.34 M
Wayne
 
5.
2.24 M
Kings
 
6.
1.92 M
Orange
 
7.
1.89 M
Queens
 
8.
1.85 M
San Diego
 
9.
1.69 M
Philadelphia
 
10.
1.62 M
Miami-Dade
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2 Comments
CommanderPro63
+1
Level 69
May 14, 2026
You wrote countries in the title on accident.
DrewFan
+1
Level 74
May 14, 2026
Thanks!

I didn't notice my change wasn't submitted.

Most Populous US Counties by Decade (1790-2050)
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