State	Area Within Ohio River Basin (Square Miles)	Population
		1970	1980	1990	2000
Illinois	10,745	606,062	634,259	623,454	630,523
Indiana	29,135	3,597,990	3,830,357	3,882,781	4,262,799
Kentucky	39,375	3,163,493	3,603,516	3,269,605	3,983,672
New York	1,955	158,355	172,303	163,747	163,878
Ohio	29,570	6,298,122	6,558,723	6,692,023	7,114,446
Pennsylvania	15,620	3,761,083	3,693,843	3,451,633	3,418,325
Virginia	7,175	438,698	531,743	515,052	531,594
West Virginia	20,610	1,616,986	1,789,585	1,601,541	1,593,454
Total	154,185	19,640,789	20,814,329	20,199,836	21,698,691

Net Change in Population, 1970 - 2000: +2,057,902 (+10.5%)

Net Change in Population, 1980 - 1990: -614,493 (-3.0%)

Persons per square mile, 2000: 140

Land area data taken from Commission sources. Population data from the 1970, 1980, 1990, and 2000 US Census.