This paper presents decennial census population totals for the 100 largest cities and other urban places in the United States based on the 21 decennial censuses taken from 1790 to 1990. This is the first time that the populations of America's largest urban areas at each census have been published in a single report. The report begins with useful background on three central topics: Urban and Urban Place, City Populations and Annexations, and Cities and Their Suburbs. The data are offered in 26 detailed statistical tables and two text tables. Explanations of detailed tables, sources and limitations of the data, notes for individual places, and references are also provided.