Fourteenth census of the United States
← 1910 January 5, 1920 1930 →
U.S. Census Bureau seal
General information
Country	United States
Results
Total population	106,021,537 ( 15.0%)
Most populous ​state	New York 10,385,227
Least populous ​state	Nevada 77,407

The 1920 United States census, conducted by the Census Bureau during one month from January 5, 1920, determined the resident population of the United States to be 106,021,537, an increase of 15.0 percent over the 92,228,496 persons enumerated during the 1910 census.

Despite the constitutional requirement that House seats be reapportioned to the states respective of their population every ten years according to the census, members of Congress failed to agree on a reapportionment plan following this census, and the distribution of seats from the 1910 census remained in effect until 1933. In 1929, Congress passed the Reapportionment Act of 1929 which provided for a permanent method of reapportionment and fixed the number of representatives at 435.

This was the first census in which the United States recorded a population of more than 100 million. It was also the first census in which a state—New York—recorded a population of more than ten million.

This census also marked a significant population shift from rural to urban. According to the Census Bureau, "Beginning in 1910, the minimum population threshold to be categorized as an urban place was set at 2,500. "Urban" was defined as including all territory, persons, and housing units within an incorporated area that met the population threshold. The 1920 census marked the first time in which over 50 percent of the U.S. population was defined as "urban."^[1]

The 1920 census collected the following information:^[2]

Full documentation for the 1920 census, including census forms and enumerator instructions, is available from the Integrated Public Use Microdata Series.

Rank	State	Population as of 1920 census	Population as of 1910 census	Change	Percent change
1	New York	10,385,227	9,113,614	1,271,613	14.0%
2	Pennsylvania	8,720,017	7,665,111	1,054,906	13.8%
3	Illinois	6,485,280	5,638,591	846,689	15.0%
4	Ohio	5,759,394	4,767,121	992,273	20.8%
5	Texas	4,663,228	3,896,542	766,686	19.7%
6	Massachusetts	3,852,356	3,366,416	485,940	14.4%
7	Michigan	3,668,412	2,810,173	858,239	30.5%
8	California	3,426,865	2,377,549	1,049,312	44.1%
9	Missouri	3,404,055	3,293,335	110,720	3.4%
10	New Jersey	3,155,900	2,537,167	618,733	24.4%
11	Indiana	2,930,390	2,700,876	229,514	8.5%
12	Georgia	2,895,832	2,609,121	286,711	11.0%
13	Wisconsin	2,632,067	2,333,860	298,207	12.8%
14	North Carolina	2,559,123	2,206,287	352,836	16.0%
15	Kentucky	2,416,630	2,289,905	126,725	5.5%
16	Iowa	2,404,021	2,224,771	179,250	8.1%
17	Minnesota	2,387,125	2,075,708	311,417	15.0%
18	Alabama	2,348,174	2,138,093	210,081	9.8%
19	Tennessee	2,337,885	2,184,789	153,096	7.0%
20	Virginia	2,309,187	2,061,612	247,575	12.0%
21	Oklahoma	2,028,283	1,657,155	371,128	22.4%
22	Louisiana	1,798,509	1,656,388	142,121	8.6%
23	Mississippi	1,790,618	1,797,114	-6,496	-0.4%
24	Kansas	1,769,257	1,690,949	78,308	4.6%
25	Arkansas	1,752,204	1,574,449	177,755	11.3%
26	South Carolina	1,683,724	1,515,400	168,324	11.1%
27	West Virginia	1,463,701	1,221,119	242,582	19.9%
28	Maryland	1,449,661	1,295,346	154,315	11.9%
29	Connecticut	1,380,631	1,114,756	265,875	23.9%
30	Washington	1,356,621	1,141,990	214,631	18.8%
31	Nebraska	1,296,372	1,192,214	104,158	8.7%
32	Florida	968,470	752,619	215,851	28.7%
33	Colorado	939,629	799,024	140,605	17.6%
34	Oregon	783,389	672,765	110,624	16.4%
35	Maine	768,014	742,371	25,643	3.5%
36	North Dakota	646,872	577,056	69,816	12.1%
37	South Dakota	636,547	583,888	52,659	9.0%
38	Rhode Island	604,397	542,610	61,787	11.4%
39	Montana	548,889	376,053	172,836	46.0%
40	Utah	449,396	373,351	76,045	20.4%
41	New Hampshire	443,083	430,572	12,511	2.9%
-	District of Columbia	437,571	331,069	106,502	32.2%
42	Idaho	431,866	325,594	106,272	32.6%
43	New Mexico	360,350	327,301	33,049	10.1%
44	Vermont	352,428	355,956	-3,528	-1.0%
45	Arizona	334,162	204,354	129,808	63.5%
-	Hawaii	255,881	191,874	64,007	33.4%
46	Delaware	223,003	202,322	20,681	10.2%
47	Wyoming	194,402	145,965	48,437	33.2%
48	Nevada	77,407	81,875	-4,468	-5.5%
-	Alaska	55,036	64,356	-9,320	14.5%

New York

Chicago

Philadelphia

Detroit

Cleveland

St. Louis

Boston

Baltimore

Pittsburgh

Los Angeles

Buffalo

San Francisco

Milwaukee

Washington

Newark

Cincinnati

New Orleans

Minneapolis

Kansas City

Seattle

Indianapolis

Jersey City

Rochester

Portland

Denver

Toledo

Providence

Columbus

Louisville

Saint Paul

Oakland

Akron

Atlanta

Omaha

Worcester

Birmingham

Syracuse

Richmond

New Haven

Memphis

San Antonio

Dallas

Dayton

1

Houston

Hartford

Scranton

Grand Rapids

2

class=notpageimage|

Location of 50 largest cities by population in the United States in 1920. Not shown: Manila, Philippines.
Numbered Cities
1. Bridgeport, Connecticut
2. Paterson, New Jersey

The original census enumeration sheets were microfilmed by the Census Bureau in the 1940s, after which the original sheets were destroyed.^[5] The microfilmed census is available in rolls from the National Archives and Records Administration. Several organizations also host images of the microfilmed census online, and digital indices.

Microdata from the 1920 census are freely available through the Integrated Public Use Microdata Series. Aggregate data for small areas, together with electronic boundary files, can be downloaded from the National Historical Geographic Information System.

• 1921 U.S Census Report Contains 1920 census results
• Historic US Census data
• 1920 Census
• [census.gov/population/www/censusdata/PopulationofStatesandCountiesoftheUnitedStates1790-1990.pdf]
• 1920 census on archive.org