|1990 Census Page|
http://factfinder2.census.gov/faces/nav/jsf/pages/index.xhtml .) The population numbers shown are generally those reported in each census. There are four parts to this publication, along with supplementary spreadsheets.
Part I provides an introduction and explanation of the information contained in the report.
Part II is a single table giving the populations of states for the censuses taken since they were established as territories or states. The states generally are shown in their 1990 boundaries. If the state or its predecessor territory had a different geographic extent at the time of a census, a note in Part III explains the difference.
Part III consists of tables for each of the 50 states and the District of Columbia, with populations for counties or equivalent areas at each census. In these state tables, after the last column of populations a notes column provides information on the origin of each county, other names it has had, etc. If this information is too extensive to fit in the column, a numbered footnote is provided, which appears at the bottom of the table for the state.
Part IV provides the following: (1) the date of the first census for each county, (2) the date of the census since the county has not had any significant alterations in boundaries, and (3) the Federal Information Processing Standard (FIPS) code for the county.
Errata [PDF 15KB]
Spreadsheet Versions of Report Tables:
Part II Population of the United States and Each State: 1790-1990 [Excel, ACSII]
Part III Population of Counties, Earliest Census to 1990 [Excel, ASCII]
Part IV Historical Dates and Federal Information Processing Standards (FIPS) Codes for Each State and County [Excel, ASCII]