93401 ZIP Code, San Luis Obispo, CA

93401 is a ZIP code in San Luis Obispo, California in San Luis Obispo County. It covers 64 square miles of land. The closest ZIP codes are 93410, 93449 and 93407. 29,202 people live here in 13,522 households. With about 455 people per square mile it is lightly settled, and owners and renters are mixed (48% own). Median household income is $96,824, close to the California median of $99,122; 23% of residents moved in during the past year.

Quick facts

Key figures

MeasureValue
Residents29,202
Households13,522
Median household income$96,824
Income per person$62,643
Median age37.1
Homeowners47.9%
Median home value$973,000
Median rent$1,912
Bachelor's degree or higher55.9%
Average commute (minutes)17.3
Households with kids under 1817.0%
Moved in the past year22.5%
Below the poverty line15.4%
Broadband internet93.6%
Speak a non-English language at home15.7%

Household income

% of householdsValue
<$10K5.3%
$10–15K2.9%
$15–25K7.4%
$25–35K6.3%
$35–50K9.6%
$50–75K10.7%
$75–100K8.9%
$100–150K20.2%
$150–200K9.2%
$200K+19.5%

Age

% of all residentsValue
<107.3%
10–1910.2%
20–2414.5%
25–3415.5%
35–4412.0%
45–5410.7%
55–6410.7%
65–7410.9%
75+8.2%

Tenure

% of housing unitsValue
Owned, with mortgage27.9%
Owned outright17.0%
Rented48.6%
Vacant6.5%

Type of building

% of housing unitsValue
Detached house48.8%
Townhome9.7%
2–4 units15.1%
5–19 units11.0%
20+ units8.5%
Mobile / other6.9%

Businesses in 93401

2,161 business establishments with 31,306 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

93401 has 28 USPS carrier routes with 15,724 residential and 2,893 business mailboxes. Open the EDDM route map.

Carrier routes in 93401

93401 has 28 USPS carrier routes (22 city (C), 6 rural (R)) with 15,724 residential and 2,893 business mailboxes. Routes range from 113 homes (C023) to 991 homes (C039); the median route has 595 homes. The Census counted 13,522 households in 93401 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per routeRoutes
1–2492
250–4997
500–74914
750–9995
1,000–1,4990
1,500+0

Best routes in 93401 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

  1. Route C037 — USPS business mailboxes 336, 394 homes
  2. Route C045 — USPS business mailboxes 308, 316 homes
  3. Route C002 — USPS business mailboxes 260, 589 homes
  4. Route C028 — USPS business mailboxes 255, 810 homes
  5. Route C001 — USPS business mailboxes 234, 418 homes

Select these 5 routes on the route map

Every carrier route in 93401

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
C001City418234$44,931———
C002City589260$44,931———
C004City651162$61,617———
C006City62371$93,440———
C008City60120$132,840———
C009City45116$132,840———
C010City75943$101,929———
C015City37225$88,384———
C016City5844$87,074———
C023City1139$78,294———
C028City810255$93,637———
C029City727174$69,302———
C030City6153$44,931———
C033City503187$126,319———
C037City394336$69,938———
C039City991122$93,440———
C042City6520$126,319———
C043City639185$69,302———
C044City73315$101,929———
C045City316308$69,302———
C049City78440$69,302———
C050City63260$69,938———
R002Rural296168$164,425———
R003Rural51417$184,027———
R005Rural50437$184,027———
R006Rural4619$131,221———
R008Rural7983$144,221———
R009Rural194130$126,319———

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 93401 on the EDDM route map.

How route demographics are estimated

Mailbox counts come from USPS; demographics are estimates

The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).

How a route gets its figures: the block-group length-share method

We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.

Margins of error

Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.

Different years

USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.

Why some routes show identical figures

Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.

Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Nearby ZIP codes

Areas that include 93401

Where it ranks

Mail every home in 93401

Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 93401, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 93401 in?
93401 is a San Luis Obispo, CA mailing address. By land area, 11% lies inside San Luis Obispo, 5% lies inside Los Ranchos and 2% lies inside Edna; the rest is outside any Census-defined city or community.
What county is 93401 in?
93401 is in San Luis Obispo County.
What is the population of 93401?
About 29,202 people (±1,175), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 29,877.
What is the median household income in 93401?
$96,824 (±$9,075), compared with $99,122 for California as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 93401?
28 USPS carrier routes with 15,724 residential and 2,893 business mailboxes (18,621 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 93401?
The closest, measured center to center: 93410 (5.3 mi, California Polytechnic State University), 93449 (5.6 mi, Pismo Beach), 93407 (5.7 mi, California Polytechnic State University), 93409 (7.6 mi), 93433 (7.9 mi, Grover Beach) and 93405 (8.1 mi, San Luis Obispo).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.