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MLP Census Crosswalk Files: Older Versions

The MLP crosswalks contain HISTIDs that link persons between census years. They are intended for use with IPUMS data extracts. See the user guide. The main attributes of the different versions are described in the version history.

Crosswalk Version 1.2

Released April 2024, replaced July 2025.
10-year
20-year
30-year
1850-1860 Stata CSV 1850-1870 Stata CSV 1850-1880 Stata CSV
1860-1870 Stata CSV 1860-1880 Stata CSV 1870-1900 Stata CSV
1870-1880 Stata CSV 1880-1900 Stata CSV 1880-1910 Stata CSV
1900-1910 Stata CSV 1900-1920 Stata CSV 1900-1930 Stata CSV
1910-1920 Stata CSV 1910-1930 Stata CSV 1910-1940 Stata CSV
1920-1930 Stata CSV 1920-1940 Stata CSV 1920-1950 Stata CSV
1930-1940 Stata CSV 1930-1950 Stata CSV
1940-1950 Stata CSV
* No HIKs were generated for version 1.2 because of unresolved conflicts across the 10, 20, and 30 year links.

The version 1.2 crosswalks include a STEP variable that identifies the stage of the linking process in which the link was made.

Jonas Helgertz, Nesile Ozder, Steven Ruggles, John Robert Warren, Catherine A. Fitch, J. David Hacker, Matt A. Nelson, Joseph P. Price, Evan Roberts, and Matthew Sobek. IPUMS Multigenerational Longitudinal Panel: Version 1.2 [dataset]. Minneapolis, MN: IPUMS, 2024. https://doi.org/10.18128/D016.V1.2

Crosswalk Version 1.1

Released March 2023, replaced April 2024.

Census-to-census pairings:

HIK crosswalk. A single census crosswalk file organized by HIK (Historical Identification Key), with associated HISTIDs across all census years. This is the first version of MLP with HIKs:

Jonas Helgertz, Steven Ruggles, John Robert Warren, Catherine A. Fitch, J. David Hacker, Matt A. Nelson, Joseph P. Price, Evan Roberts, and Matthew Sobek. IPUMS Multigenerational Longitudinal Panel: Version 1.1 [dataset]. Minneapolis, MN: IPUMS, 2023. https://doi.org/10.18128/D016.V1.1

Crosswalk Version 1.0

Released September 2020, replaced March 2023.

In addition to the HISTIDs needed to perform the linking operation, the version 1.0 crosswalks contain some basic variables applying to each census in the pairing.

Jonas Helgertz, Steven Ruggles, John Robert Warren, Catherine A. Fitch, Ronald Goeken, J. David Hacker, Matt A. Nelson, Joseph P. Price, Evan Roberts, and Matthew Sobek. IPUMS Multigenerational Longitudinal Panel: Version 1.0 [dataset]. Minneapolis, MN: IPUMS, 2020. https://doi.org/10.18128/D016.V1.0

Citation and terms of use

To download these data, you must agree to IPUMS USA terms of use:

1. Cite the IPUMS MLP version listed above and the Full Count IPUMS Ancestry data version you used (current, pre-2024).

2. You may not redistribute any IPUMS-USA Full Count data that are linked to the MLP crosswalks. You may not redistribute IPUMS MLP crosswalks without permission.

To check your account status or register to use IPUMS USA, see account options.

Publications and research reports making use of IPUMS USA should be added to our Bibliography.

Contact us

For questions about IPUMS MLP, contact ipumsres@umn.edu.

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