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Historical Population Estimates Data

1998 Census Estimates of the Older Population, for States

Technical Notes Data as of July 1, 1998

(ST-98-8) Population Estimates for the U.S., Regions, Divisions, and States by 5-year Age Groups and Sex: Annual Time Series Estimates, July 1, 1990 to July 1, 1998 (includes revised April 1, 1990 census population counts)

These tables were compiled by the Administration on Aging based on the data from the These notes are excerpted from this file.

Source: Population Estimates Program, Population Division, U.S. Census Bureau,
Washington, DC 20233
Contact: Statistical Information Staff, Population Division, U.S. Census Bureau,
Internet Release Date: June 15, 1999

Documentation to Accompany July 1, 1998 Population Estimates for States by Age and Sex

The U.S. Census Bureau released these population estimates to the public in June, 1999. The estimates incorporate revisions of estimates from previous years as well as the results of special censuses and test censuses conducted by the Census Bureau.

Age - The age of individuals is age at their last birthday.

Population (Census) -  The April 1, 1990 census population is a count of the number of persons residing in an area (resident population) as reported in the 1990 Census of Population or as subsequently revised. Revisions to an area's 1990 census population count may occur as the result of (1) post-1990 census corrections of political boundaries, geographic misallocations, or documented under enumerations or over enumerations, and (2) geographic boundary updates made subsequent to the 1990 census, which include annexations, new incorporations, mergers, etc. The closing date for these two forms of revisions applied to this set of estimates was December, 1997.

Population (Estimate) - The estimated population is the computed number of persons living in an area (resident population) as of July 1. The estimated population is calculated from a demographic components of change model that incorporates information on natural change (births minus deaths) and net migration (net domestic migration and net movement from abroad) that has occurred in the area since the reference date, such as April 1, 1990, the date of the 1990 census. Additional information on the methodology used to produce these population estimates is contained in Current Population Reports P25-1127 and at our Internet site:

Resident Population - These population estimates are for the resident population. The resident population of an area includes all residents (both civilian and Armed Forces populations) living in the area. The geographic universe for the resident population is the 50 states and the District of Columbia. It excludes Puerto Rico and outlying areas under United States jurisdiction. The resident population excludes U.S. citizens residing abroad.

Note on Puerto Rico:  Data is from the Census Bureau International Data Base (IDB) (

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