San Luis Obispo County, California Population 2021

San Luis Obispo County, California's estimated population is 282,625 with a growth rate of -0.09% 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 269,802 and has seen a growth of 4.75% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Growth Rate
2021282,625-243-0.09%
2020282,868-243-0.09%
2019283,111-243-0.09%
2018283,3548730.31%
2017282,4816780.24%
2016281,8031,7260.62%
2015280,0771,8500.66%
2014278,2272,5310.92%
2013275,6961,5360.56%
2012274,1603,1021.14%
2011271,0581,2560.47%
2010269,80252,64024.24%
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%
189016,0726,93075.80%
18809,1424,37091.58%
18704,7722,990167.79%
18601,7821,446430.36%
18503360.00%
2021 Growth Rate
-0.09%
County Seat
2010 Population
269,802
Growth (since 2010)
4.75%
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San Luis Obispo County, California Population Growth

Population by Race

Race Population Percentage
White241,12385.45%
Some Other Race12,2674.35%
Two or More Races10,4373.70%
Asian10,2963.65%
Black or African American5,3191.89%
American Indian and Alaska Native2,4580.87%
Native Hawaiian and Other Pacific Islander2650.09%
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San Luis Obispo County, California Population by Race

San Luis Obispo County, California Population Pyramid 2021

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San Luis Obispo County, California Median Age

39.2


Total

37.6


Male

41.4


Female

San Luis Obispo County, California Adults

There are 231,989 adults, (54,847 of whom are seniors) in San Luis Obispo County, California.

San Luis Obispo County, California Age Dependency

59.3

Age Dependency Ratio

31

Old Age Dependency Ratio

28.3

Child Dependency Ratio

San Luis Obispo County, California Sex Ratio

Female

139,159

49.32%

Male

143,006

50.68%

San Luis Obispo County, California Population by Age

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

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San Luis Obispo County, California Household Types

Type Owner Renter
Married75.8%24.2%
All61.6%38.4%
Male50.8%49.2%
Non Family46.9%53.1%
Female45.4%54.6%

61.6%

Rate of Home Ownership

San Luis Obispo County, California Households and Families

Type Count Average Size Owned
All105,9812.5161.6
Married53,6053.0675.8
Non Family38,8131.4846.9
Female8,9633.2645.4
Male4,6003.2650.8

2.98

Average Family Size

2.51

Average Household Size

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San Luis Obispo County, California Households by Type

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Education Attained Count Percentage
Less Than 9th Grade7,5604.00%
9th to 12th Grade8,9544.74%
High School Graduate37,60919.91%
Some College48,33225.59%
Associates Degree19,59010.37%
Bachelors Degree41,43621.94%
Graduate Degree25,37613.44%
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San Luis Obispo County, California Educational Attainment by Sex (over 25)

San Luis Obispo County, California Educational Attainment by Race

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Name Total High School Bachelors
White140,136135,12956,550
Hispanic34,51824,6655,279
Other Race6,5744,357753
Asian6,0865,5013,010
Multiple Races4,5044,1701,537
Black3,7763,098516
Native American1,7191,378341
Islander21218917

The highest rate of high school graduation is among white people with a rate of 96.43%.

The highest rate of bachelors degrees is among asian people with a rate of 49.46%.

San Luis Obispo County, California Educational Attainment by Race

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Name Average Male Female
Overall$43,373$52,465$35,661
Less Than High School$26,267$31,613$18,987
High School Grad$32,376$41,212$25,958
Some College$40,697$51,218$34,282
Bachelors Degree$55,690$72,452$45,125
Graduate Degree$72,271$87,309$62,395

$43,373

Average Earnings

$52,465

Average Male

$35,661

Average Female

San Luis Obispo County, California Earnings by Educational Attainment

San Luis Obispo County, California Language by Age

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San Luis Obispo County, California Language

82.05% of San Luis Obispo County, California residents speak only English, while 17.95% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 13.37% of the population.

San Luis Obispo County, California Language

San Luis Obispo County, California Poverty by Race

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Name Total In Poverty Poverty Rate
White186,15121,70011.66%
Hispanic60,5188,16913.50%
Other11,1541,94417.43%
Asian8,2631,39816.92%
Multiple9,6391,31713.66%
Black3,19085626.83%
Native2,2951275.53%

12.50%

Overall Poverty Rate

11.90%

Male Poverty Rate

13.09%

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 26.83% below the poverty level.

The race least likely to be in poverty in San Luis Obispo County, California is Native, with 5.53% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.04%. Among those working part-time, it was 21.14%, and for those that did not work, the poverty rate was 18.06%.

San Luis Obispo County, California Poverty

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Name Poverty
Less Than High School16.17%
High School11.22%
Some College8.50%
Bachelors or Greater4.43%

San Luis Obispo County, California Poverty Rate by Education

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Name Poverty
Male Unemployed31.21%
Female Unemployed26.71%
Female Employed9.21%
Male Employed6.75%

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

San Luis Obispo County, California Income by Household Type

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Name Median Mean
Households$73,518$96,196
Families$92,716$113,536
Married Families$104,171$125,990
Non Families$43,129$60,633
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Income by Household Type

San Luis Obispo County, California Marital Status

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Marriage Rates

47.8%

Overall Marriage Rate

48.3%

Male Marriage Rate

47.4%

Female Marriage Rate

San Luis Obispo County, California Married by Age and Sex

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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 35-44.

San Luis Obispo County, California Marital Status by Race

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San Luis Obispo County, California Marital Status

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16,767

Number of Veterans

15,929

Male Veterans

838

Female Veterans

War Veterans
Vietnam7,449
First Gulf War2,101
Second Gulf War2,039
Korea1,957
World War II781

San Luis Obispo County, California Veterans by War

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Age Group Veterans
65 to 745,437
75+5,205
55 to 642,750
35 to 542,310
18 to 341,065

San Luis Obispo County, California Veterans by Age

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Name Veterans % of Total
White15,2037.64%
Hispanic1,4583.30%
2 or More5538.32%
Black2976.78%
Asian2923.16%
Other2282.67%
Indian1708.26%
Hawaiian2411.32%

San Luis Obispo County, California Veterans by Race

San Luis Obispo County, California Veterans by Education

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6.62%

Veteran Poverty Rate

32.59%

Veteran Disability Rate

San Luis Obispo County, California Veterans by Education

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58.5%

Labor Force Participation

55.4%

Employment Rate

4%

Unemployment Rate

San Luis Obispo County, California Employment by Age

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San Luis Obispo County, California Employment by Race

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San Luis Obispo County, California Employment by Education

Origin of Non-Citizens

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

Origin of Naturalized Citizens

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66.37%

Born in California

89.89%

Native Born

10.11%

Foreign Born

4.91%

Non Citizen

5.20%

Naturalized

Place of Birth

89.89% of San Luis Obispo County, California residents were born in the United States, with 66.37% having been born in California. 4.91% 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

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990

Sources