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We combine full-count Census data (1850–1940) with Census/ACS samples (1950–2020) to provide the first nationally representative long-run series (1850–2020) of incarceration rates for immigrants and the US-born. As a group, immigrants had higher incarceration rates than US-born white men before 1870, similar rates between 1880-1950, and lower rates since 1960. Although there are substantial differences in incarceration by origin country, the relative decline in incarceration since 1960 occurred among immigrants from all sending regions. This decline cannot be explained by changes in immigrants’ observable characteristics or immigration policy, but may reflect immigrants’ resilience to economic shocks.