San Luis Obispo County, California Population 2023

286,261

San Luis Obispo County, California's estimated 2023 population is 286,261 with a growth rate of 0.45% in the past year according to the most recent United States census data. San Luis Obispo County, California is the 24th largest county in California. The 2010 population was 269,637 and has seen a growth of 6.17% since that time.

Note: data after 2021 is projected based on recent change

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2023 Growth Rate
0.45% (1,279)
County Seat
San Luis Obispo
2010 Population
269,637
Growth Since 2010
6.17% (16,624)

San Luis Obispo County, California Population 2023

Population by Race

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White

Two or more races

Other race

Asian

Black or African American

Native American

Native Hawaiian or Pacific Islander

San Luis Obispo County, California Population by Race

San Luis Obispo County, California Population Pyramid 2023

San Luis Obispo County, California Median Age

39.7

Total

38.2

Male

41.4

Female

San Luis Obispo County, California Adults

There are 232,556 adults, (57,234 of whom are seniors) in San Luis Obispo County, California.

San Luis Obispo County, California Age Dependency

61.3

Age Dependency Ratio

32.6

Old Age Dependency Ratio

28.6

Child Dependency Ratio

San Luis Obispo County, California Sex Ratio

Female139,12849.2%
Male143,64350.8%

San Luis Obispo County, California Population by Age

San Luis Obispo County, California Renter vs Owner Occupied by Household Type

2.98

Average Family Size

2.5

Average Household Size

62.4%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

San Luis Obispo County, California Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

San Luis Obispo County, California Educational Attainment by Sex (over 25)

San Luis Obispo County, California Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among white people with a rate of 79.5%.

The highest rate of bachelors degrees is among asian people with a rate of 34.88%.

San Luis Obispo County, California Educational Attainment by Race

All

Male

Female

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$46,624

Average Earnings

$56,024

Average Male

$38,408

Average Female

San Luis Obispo County, California Earnings by Educational Attainment

San Luis Obispo County, California Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

San Luis Obispo County, California Language

82.96% of San Luis Obispo County, California residents speak only English, while 17.04% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 12.53% of the population.

San Luis Obispo County, California Language

San Luis Obispo County, California Poverty by Race

rate

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12%

Overall Poverty Rate

11.78%

Male Poverty Rate

12.22%

Female Poverty Rate

Poverty in San Luis Obispo County, California

The race most likely to be in poverty in San Luis Obispo County, California is Black, with 18.95% below the poverty level.

The race least likely to be in poverty in San Luis Obispo County, California is White, with 11.91% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.19%. Among those working part-time, it was 20.74%, and for those that did not work, the poverty rate was 15.89%.

San Luis Obispo County, California Poverty

rate

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San Luis Obispo County, California Poverty Rate by Education

rate

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San Luis Obispo County, California Poverty Rate by Employment Status and Sex

San Luis Obispo County, California Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

San Luis Obispo County, California Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

47.5%

Overall Marriage Rate

48.1%

Male Marriage Rate

46.8%

Female Marriage Rate

San Luis Obispo County, California Married by Age and Sex

male

female

San Luis Obispo County, California Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 55-64.

San Luis Obispo County, California Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

San Luis Obispo County, California Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

17,065

Number of Veterans

16,210

Male Veterans

855

Female Veterans

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San Luis Obispo County, California Veterans by War

count

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San Luis Obispo County, California Veterans by Age

count

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San Luis Obispo County, California Veterans by Race

San Luis Obispo County, California Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

5.91%

Veteran Poverty Rate

33.65%

Veteran Disability Rate

San Luis Obispo County, California Veterans by Education

LaborForceParticipation

58.2%

Labor Force Participation

54.5%

Employment Rate

5.1%

Unemployment Rate

San Luis Obispo County, California Employment by Age

LaborForceParticipation

San Luis Obispo County, California Employment by Race

LaborForceParticipation

San Luis Obispo County, California Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

67.59%

Born in San Luis Obispo County, California

90.04%

Native Born

9.64%

Foreign Born

4.78%

Non Citizen

4.86%

Naturalized

Place of Birth

90.04% of San Luis Obispo County, California residents were born in the United States, with 67.59% having been born in California. 4.78% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

San Luis Obispo County, California Place of Birth

Sources