States with the highest average freshman graduation rate for public schools, 2009-10. The National Center for Education Statistics defines the rate as the percentage of public high school freshmen who graduate with a regular diploma four years after starting 9th grade.

States with the highest average freshman graduation rate for public schools, 2009-10
Wisconsin 90.7%
Vermont 89.6%
Minnesota 87.4%
North Dakota 87.4%
Iowa 85.7%
New Jersey 85.3%
New Hampshire 84.3%
Massachusetts 83.3%
Missouri 83.1%
Nebraska 82.9%
Source: National Center for Education Statistics, "Higher Education: Gaps in Access and Persistence Study"