IPUMS USA

The 2024 ACS 1-year PUMS data, released by the Census Bureau on December 4, are now available via IPUMS USA.

Select Samples

Variable documentation on the web site can be filtered to display only material corresponding to chosen datasets (more information on this feature).

USA Samples
USA Full Count
Puerto Rico
USA Linked Censuses

Use linked censuses. The option to link census data is available for USA full-count datasets only.
[More info]

**Select Linked Census Pairs (case counts in millions)**
Sample Years		Second Year
Sample Years		1860	1870	1880	1900	1910	1920	1930	1940	1950
First Year	1850	1850 linked to 1860 with 8.0 million cases	1850 linked to 1870 with 4.6 million cases	1850 linked to 1880 with 3.9 million cases	1850 linked to 1900 with 1.4 million cases	1850 linked to 1910 with 0.7 million cases	1850 linked to 1920 with 0.3 million cases	1850 linked to 1930 with 0.1 million cases	linking from 1850 to 1940 is not available	linking from 1850 to 1950 is not available
	1860	linking from 1860 to 1860 is not available	1860 linked to 1870 with 10.4 million cases	1860 linked to 1880 with 6.8 million cases	1860 linked to 1900 with 2.8 million cases	1860 linked to 1910 with 1.7 million cases	1860 linked to 1920 with 0.9 million cases	1860 linked to 1930 with 0.4 million cases	1860 linked to 1940 with 0.1 million cases	linking from 1860 to 1950 is not available
	1870	linking from 1870 to 1860 is not available	linking from 1870 to 1870 is not available	1870 linked to 1880 with 15.9 million cases	1870 linked to 1900 with 6.7 million cases	1870 linked to 1910 with 4.4 million cases	1870 linked to 1920 with 2.6 million cases	1870 linked to 1930 with 1.5 million cases	1870 linked to 1940 with 0.7 million cases	1870 linked to 1950 with 0.2 million cases
	1880	linking from 1880 to 1860 is not available	linking from 1880 to 1870 is not available	linking from 1880 to 1880 is not available	1880 linked to 1900 with 13.8 million cases	1880 linked to 1910 with 10.0 million cases	1880 linked to 1920 with 6.3 million cases	1880 linked to 1930 with 4.2 million cases	1880 linked to 1940 with 2.3 million cases	1880 linked to 1950 with 1.0 million cases
	1900	linking from 1900 to 1860 is not available	linking from 1900 to 1870 is not available	linking from 1900 to 1880 is not available	linking from 1900 to 1900 is not available	1900 linked to 1910 with 36.3 million cases	1900 linked to 1920 with 24.4 million cases	1900 linked to 1930 with 18.6 million cases	1900 linked to 1940 with 13.0 million cases	1900 linked to 1950 with 8.2 million cases
	1910	linking from 1910 to 1860 is not available	linking from 1910 to 1870 is not available	linking from 1910 to 1880 is not available	linking from 1910 to 1900 is not available	linking from 1910 to 1910 is not available	1910 linked to 1920 with 46.2 million cases	1910 linked to 1930 with 32.0 million cases	1910 linked to 1940 with 24.0 million cases	1910 linked to 1950 with 16.6 million cases
	1920	linking from 1920 to 1860 is not available	linking from 1920 to 1870 is not available	linking from 1920 to 1880 is not available	linking from 1920 to 1900 is not available	linking from 1920 to 1910 is not available	linking from 1920 to 1920 is not available	1920 linked to 1930 with 55.8 million cases	1920 linked to 1940 with 40.0 million cases	1920 linked to 1950 with 28.8 million cases
	1930	linking from 1930 to 1860 is not available	linking from 1930 to 1870 is not available	linking from 1930 to 1880 is not available	linking from 1930 to 1900 is not available	linking from 1930 to 1910 is not available	linking from 1930 to 1920 is not available	linking from 1930 to 1930 is not available	1930 linked to 1940 with 70.2 million cases	1930 linked to 1950 with 46.5 million cases
	1940	linking from 1940 to 1860 is not available	linking from 1940 to 1870 is not available	linking from 1940 to 1880 is not available	linking from 1940 to 1900 is not available	linking from 1940 to 1910 is not available	linking from 1940 to 1920 is not available	linking from 1940 to 1930 is not available	linking from 1940 to 1940 is not available	1940 linked to 1950 with 73.7 million cases

Should the extract include the households of selected individuals?

Include only those persons linked across censuses
Include all persons in the household of persons linked across censuses

	Default sample from each year
2024	ACS
2023	ACS	ACS 5yr
2022	ACS	ACS 5yr
2021	ACS	ACS 5yr
2020	ACS Uses experimental weights to correct for the effects of the COVID-19 pandemic on the 2020 ACS data collection	ACS 5yr Uses experimental weights to correct for the effects of the COVID-19 pandemic on the 2020 ACS data collection
2019	ACS	ACS 5yr
2018	ACS	ACS 5yr
2017	ACS	ACS 5yr
2016	ACS	ACS 5yr
2015	ACS	ACS 5yr
2014	ACS	ACS 5yr
2013	ACS	ACS 3yr	ACS 5yr
2012	ACS	ACS 3yr	ACS 5yr
2011	ACS	ACS 3yr	ACS 5yr
2010	ACS	ACS 3yr	ACS 5yr	10%
2009	ACS	ACS 3yr	ACS 5yr
2008	ACS	ACS 3yr
2007	ACS	ACS 3yr
2006	ACS
2005	ACS Does not include persons in group quarters.
2004	ACS Does not include persons in group quarters.
2003	ACS Does not include persons in group quarters.
2002	ACS Does not include persons in group quarters.
2001	ACS Does not include persons in group quarters.
2000	5%	1% old	1% unwt	ACS Does not include persons in group quarters.	1%
1990	5% state	1% metro	1% unwt	3% elderly	0.5% LMA
1980	5% state	1% metro	1% urban	1% LMA	1% metro/non-metro
1970	1% state fm1	1% state fm2	1% metro fm1	1% metro fm2	1% neigh fm1	1% neigh fm2
1960	1%	5%
1950	1%
1940	1%
1930	1%	5%
1920	1%
1910	1%	1.4% ovrsmp
1900	1%	5%	1.2% ovrsmp
1880	1%	10%
1870	1%	1.2%
1860	1%	1.2%
1850	1%

	Default sample from each year
2024	PRCS
2023	PRCS	PRCS 5yr
2022	PRCS	PRCS 5yr
2021	PRCS	PRCS 5yr
2020	PRCS 5yr Uses experimental weights to correct for the effects of the COVID-19 pandemic on the 2020 ACS data collection
2019	PRCS	PRCS 5yr
2018	PRCS	PRCS 5yr
2017	PRCS	PRCS 5yr
2016	PRCS	PRCS 5yr
2015	PRCS	PRCS 5yr
2014	PRCS	PRCS 5yr
2013	PRCS	PRCS 3yr	PRCS 5yr
2012	PRCS	PRCS 3yr	PRCS 5yr
2011	PRCS	PRCS 3yr	PRCS 5yr
2010	PRCS	PRCS 3yr	PRCS 5yr	PR 10%
2009	PRCS	PRCS 3yr	PRCS 5yr
2008	PRCS	PRCS 3yr
2007	PRCS	PRCS 3yr
2006	PRCS
2005	PRCS Does not include persons in group quarters.
2000	PR 5%	PR 1% old	PR 1%
1990	PR 5%	PR 1%
1980	PR 5%	PR 1%
1970	PR 5% state	PR 1% metro	PR 1% neigh
1930	PR 5%
1920	PR 12%
1910	PR 12%

1950	100% Preliminary release
1940	100%
1930	100%
1920	100%
1910	100%
1900	100%
1880	100%
1870	100%
1860	100%
1850	100%