(ST-99-21) Estimates of the Median Age of the Population for the U.S., Regions, Divisions, and States: July 1, 1999 (includes April 1, 1990 census median age figures) The documentation is located at the end of the data file. Source: Population Estimates Program, Population Division, U.S. Census Bureau, Washington, DC 20233 Contact: Statistical Information Staff, Population Division, U.S. Census Bureau, (301) 457-2422 Internet Release Date: March 9, 2000 Median Age, Median Age, July 1, 1999 April 1, 1990 U.S. 35.5 32.8 Northeast 36.9 34.0 New England 36.7 33.6 Mid Atlantic 37.0 34.2 Midwest 35.7 32.9 East North Central 35.6 32.8 West North Central 35.8 33.0 South 35.5 32.7 South Atlantic 36.3 33.5 East South Central 35.7 32.8 West South Central 33.7 31.2 West 34.1 31.7 Mountain 34.1 31.5 Pacific 34.1 31.7 Alabama 36.0 32.9 Alaska 30.9 29.3 Arizona 34.5 32.0 Arkansas 36.0 33.7 California 33.6 31.3 Colorado 35.7 32.4 Connecticut 37.0 34.3 Delaware 35.9 32.7 District of Columbia 37.6 33.2 Florida 38.7 36.2 Georgia 34.0 31.4 Hawaii 36.9 32.5 Idaho 33.5 31.5 Illinois 35.2 32.7 Indiana 35.4 32.7 Iowa 36.9 34.0 Kansas 35.4 32.8 Kentucky 36.1 32.9 Louisiana 34.1 30.9 Maine 37.8 33.8 Maryland 35.7 32.9 Massachusetts 36.5 33.4 Michigan 35.5 32.5 Minnesota 35.4 32.4 Mississippi 33.7 31.1 Missouri 36.1 33.4 Montana 37.8 33.8 Nebraska 35.5 32.9 Nevada 35.3 33.2 New Hampshire 35.9 32.7 New Jersey 37.0 34.3 New Mexico 34.5 31.1 New York 36.4 33.7 North Carolina 35.5 33.0 North Dakota 36.2 32.3 Ohio 36.1 33.3 Oklahoma 35.8 33.1 Oregon 36.9 34.5 Pennsylvania 37.9 34.9 Rhode Island 36.6 33.8 South Carolina 35.5 31.9 South Dakota 35.4 32.4 Tennessee 36.2 33.5 Texas 33.0 30.6 Utah 26.7 26.2 Vermont 37.2 32.9 Virginia 35.4 32.5 Washington 35.5 33.0 West Virginia 38.9 35.3 Wisconsin 36.0 32.8 Wyoming 36.1 32.0 Documentation to Accompany July 1, 1999 Population Estimates for States by Age and Sex The U.S. Census Bureau released these population estimates to the public in March, 2000. 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. Census Regions and Divisions - The Census Bureau delineates two sets of sub-national regions that are formed of states. This two-tiered system of regions consists of 9 census divisions nested within 4 census regions. The Northeast region includes the New England division: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont; and the Middle Atlantic division: New Jersey, New York, and Pennsylvania. The Midwest region includes the East North Central division: Illinois, Indiana, Michigan, Ohio, and Wisconsin; and the West North Central division: Iowa, Kansas, Minnesota, Missouri, Nebraska, North Dakota, and South Dakota. The South region includes the South Atlantic division: Delaware, District of Columbia, Florida, Georgia, Maryland, North Carolina, South Carolina, Virginia, West Virginia; the East South Central division: Alabama, Kentucky, Mississippi, and Tennessee; and the West South Central division: Arkansas, Louisiana, Oklahoma, and Texas. The West region includes the Mountain division: Arizona, Colorado, Idaho, Montana, Nevada, New Mexico, Utah, and Wyoming; and the Pacific division: Alaska, California, Hawaii, Oregon, and Washington. Median Age - The median age divides the age distribution into two equal parts; half of the cases fall below the median value and half are above the median value. 4/1/90 - is an estimate of the 1990 population for governmental units with boundaries reported as legally effective as of January 1, 1998. This includes annexations, new incorporations, mergers, et cetera. 7/1/90 through 7/1/99 - 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. Sex - These statistics provide population estimates for males, females, and the total population.