Data Last Updated: July 1, 2025

San Luis Obispo County, CA ZIP Codes

ZIP Codes: Shows how many general ZIP Codes, PO Boxes, Unique (Business), and Multi County ZIP Codes are associated with San Luis Obispo, CA.	38 ZIP Codes (22 General, 12 PO Box, 2 Unique, & 2 Multi County) [More Details]
Area Codes: The Telephone Area Codes that are associated with San Luis Obispo, CA. Area Codes are used in the North American Numbering Plan (NANP) to facilitate phone routing. There are approximately 350 area codes in use in the United States.	805, 820
Timezone: Time zone designation within the U.S. Please note that not all areas in the U.S. observe daylight saving time which can affect actual local time for this city. There are 7 standard time zones which are, from west to east: Hawaii-Aleutian, Alaska, Pacific, Mountain, Central, Eastern, Atlantic. Also included in U.S. Territories are Samoa, Guam and Palau.	Pacific
Local Time: The current local time for each timezone. If more than 1 time zone for this area, all local times will be shown. Counties can cross timezones, so more than 1 may be shown.	12:00:00 AM
Population: The population of San Luis Obispo, CA from the U.S. Census 2020. Included are U.S. Citizens, permanent residents, temporary migrants, and undocumented individuals. The total population represents people who live in the city, not just those present while the Census was being completed.	282,424 [More Details]
FIPS: FIPS stands for Federal Information Processing Standards, which are a set of publicly announced standards for computer systems. A county FIPS code is a unique numeric identifier for a county in the United States, assigned by the National Institute of Standards and Technology (NIST). County FIPS codes have five digits, with the first two digits identifying the state and the last 3 indicating the county.	06079
CBSA: A Core Based Statistical Area (CBSA) is the recognized term for a region that functions around an urban core with a population of at least 10,000 people, according to the standards set by the Office of Management and Budget (OMB) in 2000. A CBSA is divided into two subsets: Metro and Micro, and these classifications are determined by population density. A Micro area is identified by a population ranging between 10,000 to 50,000, while a Metro area is defined as having a population that exceeds 50,000.	San Luis Obispo-Paso Robles, CA
Land Area: The approximate amount of land area covered by San Luis Obispo, CA in square miles. The Land Area provided by the Census Bureau is based on geographic boundaries that include the mainland, islands, inland, coastal, Great Lakes, and territorial waters associated with each city.	3,301 square miles
Water Area: The approximate amount of water area covered by San Luis Obispo, CA in square miles. Calculations by the Census Bureau for Water Area take into account inland bodies of water, coastal regions, Great Lakes, and territorial sea waters. This encompasses features such as lakes, reservoirs, rivers, and coastal water bodies.	315 square miles
Coordinates: The latitude/longitude centroid coordinates for San Luis Obispo County, CA.	-120.404352, 35.387106
Quick Link: Copy the direct link to the San Luis Obispo, CACounty page and use anywhere you like!	https://www.zip-codes.com/county/ca-san-luis-obispo.asp

San Luis Obispo, CA ZIP Code Boundaries

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San Luis Obispo County, CA Covers 38 ZIP Codes

ZIP Code	Classification	City	Population	% of Population
ZIP Code 93252 *	General	Maricopa	1,499	--
ZIP Code 93401	General	San Luis Obispo	29,877	10.58%
ZIP Code 93402	General	Los Osos	14,500	5.13%
ZIP Code 93403	P.O. Box	San Luis Obispo	0	0.00%
ZIP Code 93405	General	San Luis Obispo	23,331	8.26%
ZIP Code 93406	P.O. Box	San Luis Obispo	0	0.00%
ZIP Code 93407	General	San Luis Obispo	462	0.16%
ZIP Code 93408	Unique	San Luis Obispo	0	0.00%
ZIP Code 93409	Unique	San Luis Obispo	3,806	1.35%
ZIP Code 93410	General	San Luis Obispo	7,929	2.81%
ZIP Code 93412	P.O. Box	Los Osos	0	0.00%
ZIP Code 93420	General	Arroyo Grande	30,540	10.81%
ZIP Code 93421	P.O. Box	Arroyo Grande	0	0.00%
ZIP Code 93422	General	Atascadero	33,041	11.70%
ZIP Code 93423	P.O. Box	Atascadero	0	0.00%
ZIP Code 93424	P.O. Box	Avila Beach	1,256	0.44%
ZIP Code 93426	General	Bradley	1,260	0.45%
ZIP Code 93428	General	Cambria	5,951	2.11%
ZIP Code 93430	General	Cayucos	2,849	1.01%
ZIP Code 93432	General	Creston	1,174	0.42%
ZIP Code 93433	General	Grover Beach	12,643	4.48%
ZIP Code 93435	P.O. Box	Harmony	0	0.00%
ZIP Code 93442	General	Morro Bay	11,390	4.03%
ZIP Code 93443	P.O. Box	Morro Bay	0	0.00%
ZIP Code 93444	General	Nipomo	22,293	7.89%
ZIP Code 93445	General	Oceano	7,040	2.49%
ZIP Code 93446	General	Paso Robles	45,979	16.28%
ZIP Code 93447	P.O. Box	Paso Robles	0	0.00%
ZIP Code 93448	P.O. Box	Pismo Beach	0	0.00%
ZIP Code 93449	General	Pismo Beach	8,096	2.87%
ZIP Code 93451	General	San Miguel	4,820	1.71%
ZIP Code 93452	General	San Simeon	522	0.18%
ZIP Code 93453	General	Santa Margarita	3,045	1.08%
ZIP Code 93454 *	General	Santa Maria	40,994	--
ZIP Code 93461	General	Shandon	1,503	0.53%
ZIP Code 93465	General	Templeton	10,121	3.58%
ZIP Code 93475	P.O. Box	Oceano	0	0.00%
ZIP Code 93483	P.O. Box	Grover Beach	0	0.00%

* Indicates a Multi County ZIP Code. These ZIP Codes partially cross over into San Luis Obispo, CA, but will mostly cover area in a different County. Not included in % of Population calculations.

Important San Luis Obispo, CA Information

San Luis Obispo County, CA Covers 38 ZIP Codes. This includes 22 General ZIP Codes, 12 PO Box ZIP Codes, and 2 Unique (reserved for Business and Volume Mail Receivers). There are also 2 Multi County ZIP Codes. These records are assigned a different primary county, but they partially cover area in San Luis Obispo County.

The population for San Luis Obispo County is 282,424, according to the U.S. Census. Population Density is 85.56 persons per square mile. With 123,715 Housing Units, the Average Household Size is 2.47 persons. There are 107,797 Family Households with an Average Family Size of 3.01 persons. 4.99% of the population is without Health Insurance. The 55.55% Employment Rate is 4.25% above the national average of 59.8%.190,233 people aged 25+ have some educational achievement, with 39.20% (or 74,574 people) having attained a Bachelor's Degree or higher.More Demographics are available below.

There are 2 area codes serving this area including805 and 820. San Luis Obispo is also located in the Pacific timezone and the current local time is shown above.

San Luis Obispo is part of the San Luis Obispo-Paso Robles, CA Core Based Statistical Area (CBSA). Its CBSA Code is 42020.It is classified as a metro area, which means the combined population is 50,000 or more (at its core).

CBSAs are defined by the OMB as geographic areas that have at least one core with a population of 10,000 or more (for a micro area) and adjacent territory with a high degree of social and economic integration. CBSA codes are commonly used to accurately file Medicare claims and to verify applicable incentives using a patient's ZIP Code.

ZIP Codes in San Luis Obispo, CA have 115,453 Residential mailboxes and 10,025 Business mailboxes.There are 9,013 businesses with a total of 99,211 employees. That is an average of 11.0 employees per business. Annual payroll for these businesses is $5,476,271,000. Other Demographics

San Luis Obispo County Demographic Profile

Population & People

Total Population

282,424

Income

Median Household Income

$93,398

Housing

Total Housing Units

123,715

Health

Without Healthcare Coverage

4.99%

Business & Economy

Total Businesses

9,013

Families

Total Households

107,797

Employment

Employment Rate

55.55%

Education

Bachelor's Degree or Higher

39.20%

Total Population: Total number of people from the 2020 U.S. Census for San Luis Obispo, CA. This reflects the exact count of this area at that point in time, not future estimates, regardless of citizenship or immigration status. It is intended to count all persons living within the geographic area, not just those present on the day of the census.	282,424
Current Population Estimate: This field gives the estimated household population for All ZIP Codes in San Luis Obispo, CA. This is derived from known delivery information, household occupancy rates, household size, and more to come up with an accurate estimation for the current population. IMPORTANT: This does not include population totals for persons in nursing homes, correctional facilities, or other institutions. This is an estimation of the household population based on US Postal Service delivery information.	283,625
Total Households: Total number of Households from the 2020 U.S. Census for San Luis Obispo, CA. A Household includes everyone living in a residential housing unit. This includes families, roommates in a single residence, or a person living alone.	107,797
Total Housing Units: The total number of Housing Units is the number of occupied units + the number of vacant units. Ownership is defined by whether the unit is occupied by an owner or by a tenant. Owner occupancy means that the owner lives in the unit. This value comes from the 2020 U.S. Census and is not a projection or estimate.	123,715
Average Household Size: The Average Household Size, is obtained by dividing the number of people in Households (excluding those in group quarters, nursing home, prisons, and dorm rooms) by the number of Households. A Household includes everyone living in a residential unit. Those who do not live in a household are classified as living in group accommodation. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	2.47
Average Family Size: Average Family Size is calculated by dividing the number of people in a Family Household by the number of Family Households. The U.S. Census Bureau defines family households as households consisting of two or more individuals who are related by birth, marriage, or adoption. They also may include other unrelated people. Non-family households consist of people who live alone or who share their residence with unrelated individuals. The Average Family Size only looks at the households classified as Family Households. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	3.01

Other San Luis Obispo Demographics

# Residential Mailboxes: The number of active residential delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	115,453
# Business Mailboxes: The number of active business delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	10,025
Total Delivery Receptacles: The total number of delivery receptacles. This includes curb side mailboxes, centralized units, PO Boxes, NDCBU, and contract boxes. This count is for Residential and Business combined.	176,941
Single Family Delivery Units: Total count of single family mail delivery receptacles; generally analogous to homes.	66,979
Multi Family Delivery Units: Total count of multifamily mail delivery receptacles; generally analogous to apartments.	8,136

# of Businesses: The total number of Business Establishments. Data taken from Business Census 2023.	9,013
1st Quarter Payroll: The total payroll for the first quarter. Data taken from Business Census 2023.	$1,262,328,000
Annual Payroll: The total annual payroll . Data taken from Business Census 2023.	$5,476,271,000
# of Employees: The total number of employees for all ZIP Codes in this City. Data taken from Business Census 2023.	99,211

Sum of all ZIP Codes assigned San Luis Obispo, CA as their primary County.

References

U.S. Postal Service [Last Updated: 7/1/2025], https://www.usps.com
ZIP-Codes.com Internal Data Creation [Last Updated: 7/1/2025], https://www.zip-codes.com
U.S. Geological Survey [Updated as needed], https://www.usgs.gov
U.S. Census [Updated Yearly], https://www.census.gov
U.S. Census 2020 [Decennial] [Last Updated: 5/25/2023], https://www.census.gov