San Luis Obispo County, CA Population

Overview

282,771

Total Population

39.7

Median age

49.20%

Female population %

103.2:100

Gender ratio (M:F)

20-24 years

Largest age group

53.6

Total dependency ratio

White

Largest racial group

65,588

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

San Luis Obispo County's population is old compared to the rest of the country:

The median age in San Luis Obispo County is 39.7, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
San Luis Obispo County's population under 18 was 17.76%, compared to the 22.51% nationwide.
San Luis Obispo County's elderly or the senior population (over 65 age) was 20.24% as compared to 16.04% nationwide.
Of the total population in San Luis Obispo County, 14.65% were under the age of 15, 23.76% aged 15 to 29, 41.35% aged 30 to 64, 17.91% aged 65 to 84, and 2.33% were 85 years of age and older.

There are 4,515 less females than males in San Luis Obispo County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 49.20% females and 50.80% males in San Luis Obispo County, CA.
The San Luis Obispo County, CA gender ratio is 103.2:100 i.e. 103.2 men to 100 women (1.032).
For male population, the largest age group is 20-24 years with a population of 16,018.
For the female population, the largest age group is 20-24 years with a population of 12,793.

San Luis Obispo County's population has become increasingly diverse:

Racial distribution of San Luis Obispo County population: 79.86% are White, 1.50% are Black or African American, 0.84% are American Indian and Alaska Native, 3.58% are Asian, 0.11% are Native Hawaiian and other Pacific Islander, 4.54% are some other race and 9.57% are multiracial.
San Luis Obispo County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 65,588 is Hispanic or Latino (of any race), and 217,183 (76.81% of the total population) is Non-Hispanic.
The largest racial group in San Luis Obispo County is White with a population of 225,822 (79.86% of the total population).

San Luis Obispo County's population has already reached its peak and is showing a trend of decline:

The peak population was 283,250 in the year 2018
From 2000 to 2010, San Luis Obispo County's population increased by 21,869 (8.82%), as compared to the national growth of 9.63%.
From 2010 to 2020, San Luis Obispo County's population increased by 12,079 (4.48%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
Between the year 2000 and 2022, San Luis Obispo County's population was lowest in year 2000 at 247,931.