San Luis Obispo County Population

1850–2026

282.58K

2026 projection

0.1% since 2020 (increase)

050K100K150K200K250K300K186018801900192019401960198020002020

Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for San Luis Obispo County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
2026282,581+2140.08%
2025282,367+2140.08%
2024282,153-720.03%
2023282,225-5220.18%
2022282,747+2,9081.04%
2021279,839-2,4180.86%
2020282,257-4710.17%
2019282,728-5220.18%
2018283,250+7770.28%
2017282,473+5890.21%

Showing 10 of 32 years.

San Luis Obispo County Demographics

40.4median age

Median age

Female42.3 yrs
Male38.9 yrs

Adults

232,311
62,338 seniors (65+) · 27% of adults169,973 other adults

Sex

Female 49.6% · 139,589Male 50.4% · 141,966

Population by age

MaleFemale85+ years, male: 2,98885+ years, female: 3,63480–84 years, male: 2,86480–84 years, female: 3,57775–79 years, male: 5,55875–79 years, female: 6,74570–74 years, male: 8,12970–74 years, female: 8,95265–69 years, male: 9,39965–69 years, female: 10,49260–64 years, male: 8,90560–64 years, female: 9,97855–59 years, male: 7,90255–59 years, female: 8,13350–54 years, male: 7,65450–54 years, female: 7,13945–49 years, male: 7,47845–49 years, female: 6,91640–44 years, male: 7,93140–44 years, female: 7,58135–39 years, male: 9,17235–39 years, female: 8,11830–34 years, male: 8,47530–34 years, female: 7,30925–29 years, male: 7,92725–29 years, female: 7,39620–24 years, male: 15,28620–24 years, female: 12,78315–19 years, male: 11,82815–19 years, female: 11,12110–14 years, male: 7,76810–14 years, female: 6,6795–9 years, male: 6,5005–9 years, female: 6,9340–4 years, male: 6,2020–4 years, female: 6,10285+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45K5K10K10K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 2,816 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

San Luis Obispo County Income

$97,446median household income

Median household income

$97,446

Half of households earn more, half earn less

Median earnings

$56,484

Typical yearly pay for a worker 25 or older.

Poverty rate

12.9%

About 1 in 8 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

San Luis Obispo County Marital Status

48% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married48%48%47%
Never married36%40%32%
Divorced10%8%12%
Widowed5%2%8%
Separated2%1%2%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

8 sources, all from the U.S. Census Bureau

Population

American Community Survey, 2024 5-year