Top 10 states (and Washington, D.C.) with the highest percentage of persons aged 25 to 34 who are college graduates, 2010:

States with the highest percentage of college graduates (age 25-34)
Nevada 134.0%
Arizona 76.4%
Washington, D.C. 68.8%
Massachusetts 54.3%
North Dakota 50.8%
Minnesota 49.8%
New York 49.6%
New Jersey 47.2%
New Hampshire 46.0%
Connecticut 45.9%
Maryland 45.5%
Iowa 45.5%
Source: U.S. Department of Education