About this application: This application provides summary profiles showing frequently requested data items from various US Census Bureau programs. Profiles are available for the nation, states, and counties.
High school graduate or higher, percent of persons age 25 years+, 2014-2018 - (Percent)
County
Value
Adams
92.6
Alexander
80.9
Bond
89.7
Boone
86.2
Brown
84.3
Bureau
91.6
Calhoun
90.6
Carroll
91.4
Cass
84.0
Champaign
95.1
Christian
88.8
Clark
90.9
Clay
89.9
Clinton
89.9
Coles
90.5
Cook
86.7
Crawford
86.9
Cumberland
89.6
De Witt
91.1
DeKalb
92.4
Douglas
82.3
DuPage
92.6
Edgar
89.2
Edwards
91.5
Effingham
92.6
Fayette
83.0
Ford
90.0
Franklin
87.7
Fulton
88.1
Gallatin
88.0
Greene
87.9
Grundy
93.1
Hamilton
88.5
Hancock
93.2
Hardin
81.1
Henderson
90.1
Henry
90.2
Iroquois
89.2
Jackson
92.2
Jasper
89.3
Jefferson
86.0
Jersey
91.7
Jo Daviess
91.8
Johnson
82.2
Kane
84.1
Kankakee
87.9
Kendall
92.1
Knox
88.8
Lake
90.6
LaSalle
88.7
Lawrence
84.7
Lee
88.8
Livingston
89.3
Logan
88.9
Macon
90.3
Macoupin
91.0
Madison
92.1
Marion
88.8
Marshall
92.8
Mason
88.8
Massac
86.2
McDonough
93.5
McHenry
92.8
McLean
95.9
Menard
93.4
Mercer
91.4
Monroe
96.0
Montgomery
86.6
Morgan
91.7
Moultrie
85.3
Ogle
89.9
Peoria
90.4
Perry
84.4
Piatt
93.6
Pike
88.7
Pope
86.0
Pulaski
85.7
Putnam
92.3
Randolph
83.4
Richland
87.8
Rock Island
88.9
Saline
86.4
Sangamon
92.4
Schuyler
89.8
Scott
92.6
Shelby
92.2
St. Clair
90.8
Stark
90.9
Stephenson
92.9
Tazewell
92.6
Union
87.7
Vermilion
88.1
Wabash
90.5
Warren
87.7
Washington
92.1
Wayne
88.4
White
91.3
Whiteside
90.3
Will
90.9
Williamson
91.2
Winnebago
87.7
Woodford
94.5
Value for Illinois (Percent): 88.9%
Data item: High school graduate or higher, percent of persons age 25 years+, 2014-2018
Sources: U.S. Census Bureau, American Community Survey (ACS) and Puerto Rico Community Survey (PRCS), 5-Year Estimates. The PRCS is part of the Census Bureau's ACS, customized for Puerto Rico. Both Surveys are updated every year.
Definition
High School Graduates include people whose highest degree was a high school diploma or its equivalent, people who attended college but did not receive a degree, and people who received an associate's, bachelor's, master's, or professional or doctorate degree. People who reported completing the 12th grade but not receiving a diploma are not included. Persons with a Bachelor's Degree or Higher are those who have received a bachelor's degree from a college or university, or a master's, professional, or doctorate degree. For the complete definition, go to ACS subject definitions "Educational Attainment."
These data include only persons 25 years old and over. The percentages are obtained by dividing the counts of graduates by the total number of persons 25 years old and over.
Source and Accuracy
This Fact is based on data collected in the American Community Survey (ACS) and the Puerto Rico Community Survey (PRCS) conducted annually by the U.S. Census Bureau. A sample of over 3.5 million housing unit addresses is interviewed each year over a 12 month period. This Fact (estimate) is based on five years of ACS and PRCS sample data and describes the average value of person, household and housing unit characteristics over this period of collection.
Statistics from all surveys are subject to sampling and nonsampling error. Sampling error is the uncertainty between an estimate based on a sample and the corresponding value that would be obtained if the estimate were based on the entire population (as from a census). Measures of sampling error are provided in the form of margins of error for all estimates included with ACS and PRCS published products. The Census Bureau recommends that data users incorporate this information into their analyses, as sampling error in survey estimates could impact the conclusions drawn from the results. The data for each geographic area are presented together with margins of error at Using margins of errors. A more detailed explanation of margins of error and a demonstration of how to use them is provided below.
For more information on sampling and estimation methodology, confidentiality, and sampling and nonsampling errors, please see the Multiyear Accuracy (US) and the Multiyear Accuracy (Puerto Rico) documents at "Documentation - Accuracy of the data."
Margin of Error
As mentioned above, ACS estimates are based on a sample and are subject to sampling error. The margin of error measures the degree of uncertainty caused by sampling error. The margin of error is used with an ACS estimate to construct a confidence interval about the estimate. The interval is formed by adding the margin of error to the estimate (the upper bound) and subtracting the margin of error from the estimate (the lower bound). It is expected with 90 percent confidence that the interval will contain the full population value of the estimate. The following example is for demonstrating purposes only. Suppose the ACS reported that the percentage of people in a state who were 25 years and older with a bachelor's degree was 21.3 percent and that the margin of error associated with this estimate was 0.7 percent. By adding and subtracting the margin of error from the estimate, we calculate the 90-percent confidence interval for this estimate:
Therefore, we can be 90 percent confident that the percent of the population 25 years and older having a bachelor's degree in a state falls somewhere between 20.6 percent and 22.0 percent.
