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
Alameda
88.0
Alpine
88.9
Amador
90.3
Butte
89.3
Calaveras
90.4
Colusa
69.4
Contra Costa
89.4
Del Norte
81.0
El Dorado
93.1
Fresno
75.3
Glenn
75.3
Humboldt
90.3
Imperial
69.0
Inyo
88.8
Kern
73.8
Kings
73.7
Lake
85.2
Lassen
82.8
Los Angeles
78.7
Madera
71.9
Marin
93.2
Mariposa
90.4
Mendocino
86.9
Merced
69.4
Modoc
85.6
Mono
88.7
Monterey
71.3
Napa
85.1
Nevada
94.2
Orange
85.1
Placer
94.6
Plumas
93.9
Riverside
81.7
Sacramento
87.4
San Benito
79.9
San Bernardino
79.5
San Diego
87.1
San Francisco
88.5
San Joaquin
78.9
San Luis Obispo
90.9
San Mateo
89.2
Santa Barbara
81.0
Santa Clara
88.1
Santa Cruz
86.4
Shasta
90.8
Sierra
93.3
Siskiyou
90.0
Solano
88.0
Sonoma
88.0
Stanislaus
78.3
Sutter
78.0
Tehama
84.4
Trinity
90.6
Tulare
69.8
Tuolumne
90.4
Ventura
84.4
Yolo
86.4
Yuba
82.0
Value for California (Percent): 82.9%
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.
