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Most Populous US Counties by Decade (1790-1880)

Name the top 10 most populous US counties for each decade from 1790 to 1880, according to Imperial Statistics.
Exact Video: "Top 50 U.S Counties by Population", Uploaded: May 13th, 2026
Includes a Louisiana parish
M stands for million(s)
Quiz by
DrewFan
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Last updated: May 14, 2026
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First submittedMay 14, 2026
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Year
Rank
Population
Answer
1790
1.
116,606
Loudoun
 
2.
74,740
Albany
 
3.
66,758
Charleston
 
4.
59,986
Hampshire
 
5.
57,991
Essex
 
6.
56,912
Worcester
 
7.
55,028
Philadelphia
 
8.
45,326
Dutchess
 
9.
44,472
Suffolk
 
10.
43,223
Rockingham
Year
Rank
Population
Answer
1800
1.
97,175
Cumberland
 
2.
80,235
Philadelphia
 
3.
72,062
Hampshire
 
4.
61,101
Essex
 
5.
61,065
Worcester
 
6.
59,719
New York County
 
7.
58,446
Baltimore
 
8.
57,756
Charleston
 
9.
47,702
Dutchess
 
10.
46,806
Middlesex
Year
Rank
Population
Answer
1810
1.
178,819
Chittenden
 
2.
110,797
Philadelphia
 
3.
95,883
New York County
 
4.
76,223
Hampshire
 
5.
75,581
Baltimore
 
6.
71,742
Essex
 
7.
64,859
Worcester
 
8.
63,101
Charleston
 
9.
53,783
Lancaster
 
10.
52,709
Middlesex
Year
Rank
Population
Answer
1820
1.
136,522
Philadelphia
 
2.
123,099
New York County
 
3.
95,748
Baltimore
 
4.
87,240
Ontario
 
5.
79,834
Charleston
 
6.
74,593
Essex
 
7.
73,431
Worcester
 
8.
68,016
Lancaster
 
9.
61,279
Middlesex
 
10.
57,082
Genesee
Year
Rank
Population
Answer
1830
1.
205,225
New York County
 
2.
190,455
Philadelphia
 
3.
121,193
Baltimore
 
4.
86,250
Charleston
 
5.
84,617
Worcester
 
6.
83,149
Essex
 
7.
76,647
Middlesex
 
8.
76,812
Lancaster
 
9.
71,661
Oneida
 
10.
62,968
Suffolk
Year
Rank
Population
Answer
1840
1.
312,335
New York County
 
2.
257,801
Philadelphia
 
3.
167,162
Passaic
 
4.
143,333
Baltimore
 
5.
106,513
Middlesex
 
6.
102,104
Orleans Parish
 
7.
95,658
Suffolk
 
8.
95,276
Worcester
 
9.
94,946
Essex
 
10.
885,262
Oneida
Year
Rank
Population
Answer
1850
1.
518,608
New York County
 
2.
410,372
Philadelphia
 
3.
209,039
Baltimore
 
4.
161,947
Middlesex
 
5.
157,456
Hamilton
 
6.
145,012
Suffolk
 
7.
140,322
Kings
 
8.
138,706
Allegheny
 
9.
131,652
Essex
 
10.
131,085
Worcester
Year
Rank
Population
Answer
1860
1.
813,671
New York County
 
2.
565,530
Philadelphia
 
3.
279,124
Kings
 
4.
216,411
Hamilton
 
5.
216,355
Middlesex
 
6.
212,419
Baltimore city
 
7.
192,701
Suffolk
 
8.
190,526
St. Louis
 
9.
178,832
Allegheny
 
10.
174,491
Orleans Parish
Year
Rank
Population
Answer
1870
1.
944,101
New York County
 
2.
675,209
Philadelphia
 
3.
421,152
Kings
 
4.
351,731
Cook
 
5.
349,001
St. Louis
 
6.
274,651
Middlesex
 
7.
261,605
Suffolk
 
8.
267,799
Baltimore city
 
9.
262,846
Allegheny
 
10.
260,733
Hamilton
Year
Rank
Population
Answer
1880
1.
1.2 M
New York County
 
2.
843,621
Philadelphia
 
3.
602,245
Cook
 
4.
595,815
Kings
 
5.
441,842
Chatham
 
6.
437,803
St. Clair
 
7.
432,963
Madison
 
8.
385,527
Suffolk
 
9.
353,949
Allegheny
 
10.
343,334
St. Louis city
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Most Populous US Counties by Decade (1790-2050)
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