93420 ZIP Code, Arroyo Grande, CA
93420 is a ZIP code in Arroyo Grande, California in San Luis Obispo County. It covers 197 square miles of land. The closest ZIP codes are 93401, 93433 and 93444. 31,345 people live here in 12,672 households. With about 159 people per square mile it is lightly settled, and owners and renters are mixed (66% own). Median household income is $110,553, above the California median of $99,122; the median age is 48.2, older than most ZIP codes.
Quick facts
- Mailing city: Arroyo Grande, CA
- County: San Luis Obispo County
- Land area: 197 sq mi
- Population: 31,345
- Median household income: $110,553
- Carrier routes: 24 (12,288 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 31,345 |
| Households | 12,672 |
| Median household income | $110,553 |
| Income per person | $53,468 |
| Median age | 48.2 |
| Homeowners | 66.4% |
| Median home value | $917,900 |
| Median rent | $2,187 |
| Bachelor's degree or higher | 44.1% |
| Average commute (minutes) | 23.2 |
| Households with kids under 18 | 25.2% |
| Moved in the past year | 14.3% |
| Below the poverty line | 6.4% |
| Broadband internet | 91.8% |
| Speak a non-English language at home | 11.5% |
Household income
| % of households | Value |
|---|---|
| <$10K | 2.4% |
| $10–15K | 1.8% |
| $15–25K | 5.7% |
| $25–35K | 3.5% |
| $35–50K | 8.3% |
| $50–75K | 11.5% |
| $75–100K | 11.7% |
| $100–150K | 19.1% |
| $150–200K | 17.2% |
| $200K+ | 18.8% |
Age
| % of all residents | Value |
|---|---|
| <10 | 10.5% |
| 10–19 | 11.5% |
| 20–24 | 4.5% |
| 25–34 | 9.5% |
| 35–44 | 10.9% |
| 45–54 | 10.4% |
| 55–64 | 14.3% |
| 65–74 | 16.2% |
| 75+ | 12.2% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 37.9% |
| Owned outright | 24.1% |
| Rented | 31.1% |
| Vacant | 6.9% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 71.7% |
| Townhome | 6.3% |
| 2–4 units | 3.0% |
| 5–19 units | 4.8% |
| 20+ units | 4.8% |
| Mobile / other | 9.4% |
Businesses in 93420
888 business establishments with 7,127 employees (ZIP Codes Business Patterns 2023).
- Health Care and Social Assistance: 136
- Construction: 134
- Professional, Scientific, and Technical Services: 105
- Retail Trade: 92
- Other Services (except Public Administration): 78
- Accommodation and Food Services: 77
- Real Estate and Rental and Leasing: 60
- Administrative and Support and Waste Management and Remediation Services: 52
EDDM carrier routes
93420 has 24 USPS carrier routes with 12,288 residential and 858 business mailboxes. Open the EDDM route map.
Carrier routes in 93420
93420 has 24 USPS carrier routes (13 city (C), 11 rural (R)) with 12,288 residential and 858 business mailboxes. Routes range from 123 homes (R016) to 1,174 homes (C002); the median route has 482 homes. The Census counted 12,672 households in 93420 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 1 |
| 250–499 | 12 |
| 500–749 | 10 |
| 750–999 | 0 |
| 1,000–1,499 | 1 |
| 1,500+ | 0 |
Best routes in 93420 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C003 — USPS business mailboxes 253, 448 homes
- Route C019 — USPS business mailboxes 234, 291 homes
- Route C026 — USPS business mailboxes 105, 525 homes
- Route C005 — USPS business mailboxes 51, 683 homes
- Route R003 — USPS business mailboxes 47, 466 homes
Select these 5 routes on the route map
Every carrier route in 93420
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C001 | City | 595 | 4 | $88,784 | — | — | — |
| C002 | City | 1,174 | 8 | $110,249 | — | — | — |
| C003 | City | 448 | 253 | $83,091 | — | — | — |
| C004 | City | 747 | 6 | $79,770 | — | — | — |
| C005 | City | 683 | 51 | $94,255 | — | — | — |
| C006 | City | 643 | 7 | $99,653 | — | — | — |
| C007 | City | 546 | 5 | $81,322 | — | — | — |
| C008 | City | 665 | 35 | $83,091 | — | — | — |
| C019 | City | 291 | 234 | $88,784 | — | — | — |
| C023 | City | 578 | 17 | $79,770 | — | — | — |
| C025 | City | 564 | 1 | $126,985 | — | — | — |
| C026 | City | 525 | 105 | $167,641 | — | — | — |
| C029 | City | 665 | 32 | $112,841 | — | — | — |
| R001 | Rural | 384 | 3 | $126,985 | — | — | — |
| R002 | Rural | 316 | 9 | $107,813 | — | — | — |
| R003 | Rural | 466 | 47 | $129,097 | — | — | — |
| R004 | Rural | 403 | 0 | $107,813 | — | — | — |
| R005 | Rural | 373 | 1 | $100,526 | — | — | — |
| R007 | Rural | 337 | 7 | $174,591 | — | — | — |
| R008 | Rural | 497 | 5 | $103,289 | — | — | — |
| R012 | Rural | 441 | 1 | $107,813 | — | — | — |
| R013 | Rural | 423 | 21 | $95,109 | — | — | — |
| R015 | Rural | 401 | 5 | $100,526 | — | — | — |
| R016 | Rural | 123 | 1 | $95,109 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 93420 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
- 93401 — San Luis Obispo city, CA (8.9 mi)
- 93433 — Grover Beach city, CA (8.9 mi)
- 93444 — Nipomo CDP, CA (9.8 mi)
- 93449 — Pismo Beach city, CA (10 mi)
- 93445 — Oceano CDP, CA (12.2 mi)
- 93410 — California Polytechnic State University CDP, CA (13.5 mi)
- 93407 — California Polytechnic State University CDP, CA (14.1 mi)
- 93453 — Santa Margarita CDP, CA (15.2 mi)
Areas that include 93420
- Arroyo Grande, CA ZIP codes — 1 ZIP code
- Oceano, CA ZIP codes — 2 ZIP codes
- Callender, CA ZIP codes — 1 ZIP code
- Los Berros, CA ZIP codes — 1 ZIP code
- San Luis Obispo County ZIP codes — 26 ZIP codes
- California ZIP code data
Where it ranks
- No. 5 of 20: highest median household income in San Luis Obispo County
- No. 6 of 22: highest share of residents who moved in during the past year in San Luis Obispo County
- No. 7 of 22: highest median age in San Luis Obispo County
Mail every home in 93420
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) 93420, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 93420 in?
- 93420 is a Arroyo Grande, CA mailing address. By land area, 3% lies inside Arroyo Grande, 1% lies inside Los Berros and 1% lies inside Callender; the rest is outside any Census-defined city or community.
- What county is 93420 in?
- 93420 is in San Luis Obispo County.
- What is the population of 93420?
- About 31,345 people (±1,337), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 30,540.
- What is the median household income in 93420?
- $110,553 (±$4,535), 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 93420?
- 24 USPS carrier routes with 12,288 residential and 858 business mailboxes (13,157 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 93420?
- The closest, measured center to center: 93401 (8.9 mi, San Luis Obispo), 93433 (8.9 mi, Grover Beach), 93444 (9.8 mi, Nipomo), 93449 (10 mi, Pismo Beach), 93445 (12.2 mi, Oceano) and 93410 (13.5 mi, California Polytechnic State University).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.