This paper constructs an estimate of the total personal income for every U.S state in 1880, 1890, 1900, and 1910. The series includes new figures for 1890 and 1910, and updated figures for 1880 and 1900, which were originally estimated by Richard Easterlin more than fifty years ago. The estimation follows the methodology developed by Easterlin. The paper presents a comparison of the original with the updated 1880 and 1900 figures, a formalization of Easterlin’s methodology, the details of the data sources and the calculation of the new 1890 and 1910 U.S. states’ total personal income estimates.