Using a 100m high-resolution (100m × 100m) population distribution grid derived from the 2020 Census, we construct population-weighted crosswalks that link 2020 Commuting Zones (CZ20) and 2020 PUMAs with historical geographies: 1990 commuting zones, 2000 and 2010 ERS commuting zones, and 2010 & 2020 PUMAs. Each crosswalk reports population overlaps, shares, and totals that allow researchers to reallocate data consistently between geographies across time. These CSV crosswalks are suited for harmonizing statistics, such as jobs or household counts, while preserving national totals and enabling longitudinal analysis of labor markets, communities, and regions