San Luis Obispo County, California Population 2024

287,443

San Luis Obispo County, California's estimated 2024 population is 287,443 with a growth rate of 0.95% 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 269,800 and has seen a growth of 6.54% since that time.

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
2029301,0182,7150.91%
2028298,3032,7150.92%
2027295,5882,7150.93%
2026292,8732,7150.94%
2025290,1582,7150.94%
2024287,4432,7150.95%
2023284,7282,7150.96%
2022282,0132,7150.97%
2021279,298-2,581-0.92%
2020281,879-849-0.3%
2019282,728-522-0.18%
2018283,2507770.28%
2017282,4735890.21%
2016281,8841,7460.62%
2015280,1381,8670.67%
2014278,2712,5580.93%
2013275,7131,5390.56%
2012274,1743,1181.15%
2011271,0561,2560.47%
2010269,80000%
1990217,16261,72739.71%
1980155,43549,74547.07%
1970105,69024,64630.41%
196081,04429,62757.62%
195051,41718,17154.66%
194033,2463,63312.27%
193029,6137,72035.26%
192021,8932,51012.95%
191019,3832,74616.51%
190016,6375653.52%
189016,0726,93075.8%
18809,1424,37091.58%
18704,7722,990167.79%
18601,7821,446430.36%
1850336-300,682-99.89%
showing: 35 rows
2024 Growth Rate
0.95% (2,715)
County Seat
2020 Population
281,879
Area
3301 mi²
Density
87 people/mi²
Growth Since 2020
1.97% (5,564)

San Luis Obispo County, California Population 2024

Population by Race

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Race
Population
Percentage (of total)
White216,35476.8%
Two or more races33,47811.88%
Other race14,8245.26%
Asian10,6523.78%
Black or African American3,4861.24%
Native American2,4870.88%
Native Hawaiian or Pacific Islander4310.15%

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 2024

San Luis Obispo County, California Median Age

40

Total

38.4

Male

41.9

Female

San Luis Obispo County, California Adults

There are 232,675 adults, (59,439 of whom are seniors) in San Luis Obispo County, California.

San Luis Obispo County, California Age Dependency

62.6

Age Dependency Ratio

34.3

Old Age Dependency Ratio

28.3

Child Dependency Ratio

San Luis Obispo County, California Sex Ratio

Female139,23549.42%
Male142,47750.58%

San Luis Obispo County, California Population by Age

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

Household Type
Count
Average Size
Owner
Renter
All108,0992.476238
Married53,5773.0677.422.6
Non Family40,1921.4745.854.2
Female9,4323.165347
Male4,8982.9244.555.5

2.95

Average Family Size

2.47

Average Household Size

62.0%

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 96.57%.

The highest rate of bachelors degrees is among asian people with a rate of 46.94%.

San Luis Obispo County, California Educational Attainment by Race

All

Male

Female

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$51,919

Average Earnings

$61,547

Average Male

$42,631

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

83.16% of San Luis Obispo County, California residents speak only English, while 16.84% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 12.13% of the population.

San Luis Obispo County, California Language

San Luis Obispo County, California Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White180,81620,19411.17%
Hispanic63,0898,88414.08%
Multiple31,3324,66114.88%
Other14,3822,45017.04%
Asian9,2411,73018.72%
Black2,40856623.5%
Native2,40445218.8%
Islander38914737.79%

12.58%

Overall Poverty Rate

12.25%

Male Poverty Rate

12.92%

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 Islander, with 37.79% below the poverty level.

The race least likely to be in poverty in San Luis Obispo County, California is White, with 11.17% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.36%. Among those working part-time, it was 21.42%, and for those that did not work, the poverty rate was 16.83%.

San Luis Obispo County, California Poverty

rate

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Rate
Poverty
Less Than 9th Grade17.62%
High School10.8%
Some College7.23%
Bachelors or Greater4.58%

San Luis Obispo County, California Poverty Rate by Education

rate

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Rate
Poverty
Male Unemployed33.03%
Female Unemployed27.62%
Female Employed9.45%
Male Employed6.33%

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

47.3%

Overall Marriage Rate

48.1%

Male Marriage Rate

46.4%

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 45-54.

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

16,832

Number of Veterans

15,876

Male Veterans

956

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

5.72%

Veteran Poverty Rate

33.07%

Veteran Disability Rate

San Luis Obispo County, California Veterans by Education

LaborForceParticipation

58.6%

Labor Force Participation

55.1%

Employment Rate

5%

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

68.55%

Born in San Luis Obispo County, California

90.51%

Native Born

9.49%

Foreign Born

4.55%

Non Citizen

4.94%

Naturalized

Place of Birth

90.51% of San Luis Obispo County, California residents were born in the United States, with 68.55% having been born in California. 4.55% 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