The Census Bureau has not yet announced a release date for the 2025 ACS 1-year PUMS data. IPUMS will process the data promptly once they are available.

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

Year	Default sample from each year
2024	2024 ACS ACS	2020-2024, ACS 5-year ACS 5yr
2023	2023 ACS ACS	2019-2023, ACS 5-year ACS 5yr
2022	2022 ACS ACS	2018-2022, ACS 5-year ACS 5yr
2021	2021 ACS ACS	2017-2021, ACS 5-year ACS 5yr
2020	2020 ACS ACS Uses experimental weights to correct for the effects of the COVID-19 pandemic on the 2020 ACS data collection	2016-2020, ACS 5-year ACS 5yr Uses experimental weights to correct for the effects of the COVID-19 pandemic on the 2020 ACS data collection
2019	2019 ACS ACS	2015-2019, ACS 5-year ACS 5yr
2018	2018 ACS ACS	2014-2018, ACS 5-year ACS 5yr
2017	2017 ACS ACS	2013-2017, ACS 5-year ACS 5yr
2016	2016 ACS ACS	2012-2016, ACS 5-year ACS 5yr
2015	2015 ACS ACS	2011-2015, ACS 5-year ACS 5yr
2014	2014 ACS ACS	2010-2014, ACS 5-year ACS 5yr
2013	2013 ACS ACS	2011-2013, ACS 3-year ACS 3yr	2009-2013, ACS 5-year ACS 5yr
2012	2012 ACS ACS	2010-2012, ACS 3-year ACS 3yr	2008-2012, ACS 5-year ACS 5yr
2011	2011 ACS ACS	2009-2011, ACS 3-year ACS 3yr	2007-2011, ACS 5-year ACS 5yr
2010	2010 ACS ACS	2008-2010, ACS 3-year ACS 3yr	2006-2010, ACS 5-year ACS 5yr	2010 10% 10%
2009	2009 ACS ACS	2007-2009, ACS 3-year ACS 3yr	2005-2009, ACS 5-year ACS 5yr
2008	2008 ACS ACS	2006-2008, ACS 3-year ACS 3yr
2007	2007 ACS ACS	2005-2007, ACS 3-year ACS 3yr
2006	2006 ACS ACS
2005	2005 ACS ACS Does not include persons in group quarters.
2004	2004 ACS ACS Does not include persons in group quarters.
2003	2003 ACS ACS Does not include persons in group quarters.
2002	2002 ACS ACS Does not include persons in group quarters.
2001	2001 ACS ACS Does not include persons in group quarters.
2000	2000 5% 5%	2000 1% sample (old version) 1% old	2000 Unweighted 1% 1% unwt	2000 ACS ACS Does not include persons in group quarters.	2000 1% 1%
1990	1990 5% 5% state	1990 1% 1% metro	1990 Unweighted 1% 1% unwt	1990 Elderly 3% elderly	1990 Labor Market Area 0.5% LMA
1980	1980 5% 5% state	1980 1% 1% metro	1980 Urban/Rural 1% urban	1980 Labor Market Area 1% LMA	1980 Detailed metro/non-metro 1% metro/non-metro
1970	1970 Form 1 State 1% state fm1	1970 Form 2 State 1% state fm2	1970 Form 1 Metro 1% metro fm1	1970 Form 2 Metro 1% metro fm2	1970 Form 1 Neighborhood 1% neigh fm1	1970 Form 2 Neighborhood 1% neigh fm2
1960	1960 1% 1%	1960 5% 5%
1950	1950 1% 1%
1940	1940 1% 1%
1930	1930 1% 1%	1930 5% 5%
1920	1920 1% 1%
1910	1910 1% 1%	1910 1.4% sample with oversamples 1.4% ovrsmp
1900	1900 1% 1%	1900 5% 5%	1900 1% sample with oversamples 1.2% ovrsmp
1880	1880 1% 1%	1880 10% 10%
1870	1870 1% 1%	1870 1% sample with black oversample 1.2%
1860	1860 1% 1%	1860 1% sample with black oversample 1.2%
1850	1850 1% 1%

To create an extract with cross-census linking for full count censuses, use the USA LINKED CENSUSES tab.

Year	Samples
1950	1950 100% database 100% Preliminary release
1940	1940 100% database 100%
1930	1930 100% database 100%
1920	1920 100% database 100%
1910	1910 100% database 100%
1900	1900 100% database 100%
1880	1880 100% database (Revised November 2023) 100%
1870	1870 100% sample (Revised November 2023) 100%
1860	1860 100% sample (Revised November 2023) 100%
1850	1850 100% sample (Revised November 2023) 100%

Please note that the USA full count samples require special usage terms. Users must agree to these terms before downloading these data.

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

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