90731 ZIP Code, San Pedro, CA
90731 is a ZIP code in San Pedro, California in Los Angeles County. It covers 9.2 square miles of land. The closest ZIP codes are 90732, 90744 and 90802. 61,944 people live here in 23,185 households, more than in 9 of every 10 California ZIP codes. At about 6,715 people per square mile it is built up to city-neighborhood density, and most households rent (33% own). Median household income is $76,395, below the California median of $99,122.
Quick facts
- Mailing city: San Pedro, CA
- County: Los Angeles County
- Land area: 9.2 sq mi
- Population: 61,944
- Median household income: $76,395
- Carrier routes: 39 (24,381 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 61,944 |
| Households | 23,185 |
| Median household income | $76,395 |
| Income per person | $39,660 |
| Median age | 38.6 |
| Homeowners | 32.6% |
| Median home value | $851,000 |
| Median rent | $1,740 |
| Bachelor's degree or higher | 26.8% |
| Average commute (minutes) | 30.1 |
| Households with kids under 18 | 29.2% |
| Moved in the past year | 11.8% |
| Below the poverty line | 15.9% |
| Broadband internet | 92.1% |
| Speak a non-English language at home | 46.4% |
Household income
| % of households | Value |
|---|---|
| <$10K | 5.9% |
| $10–15K | 4.0% |
| $15–25K | 8.2% |
| $25–35K | 7.2% |
| $35–50K | 8.8% |
| $50–75K | 15.3% |
| $75–100K | 11.4% |
| $100–150K | 18.7% |
| $150–200K | 8.1% |
| $200K+ | 12.5% |
Age
| % of all residents | Value |
|---|---|
| <10 | 11.5% |
| 10–19 | 11.7% |
| 20–24 | 5.3% |
| 25–34 | 15.9% |
| 35–44 | 14.7% |
| 45–54 | 12.8% |
| 55–64 | 13.1% |
| 65–74 | 9.3% |
| 75+ | 5.8% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 22.5% |
| Owned outright | 8.5% |
| Rented | 63.9% |
| Vacant | 5.1% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 37.8% |
| Townhome | 4.7% |
| 2–4 units | 23.9% |
| 5–19 units | 20.1% |
| 20+ units | 13.5% |
| Mobile / other | 0.0% |
Businesses in 90731
976 business establishments with 9,371 employees (ZIP Codes Business Patterns 2023).
- Professional, Scientific, and Technical Services: 129
- Health Care and Social Assistance: 126
- Accommodation and Food Services: 109
- Retail Trade: 106
- Other Services (except Public Administration): 94
- Construction: 72
- Transportation and Warehousing: 57
- Real Estate and Rental and Leasing: 56
EDDM carrier routes
90731 has 39 USPS carrier routes with 24,381 residential and 1,569 business mailboxes. Open the EDDM route map.
Carrier routes in 90731
90731 has 39 USPS carrier routes (39 city (C)) with 24,381 residential and 1,569 business mailboxes. Routes range from 361 homes (C031) to 1,153 homes (C002); the median route has 609 homes. The Census counted 23,185 households in 90731 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 8 |
| 500–749 | 25 |
| 750–999 | 5 |
| 1,000–1,499 | 1 |
| 1,500+ | 0 |
Best routes in 90731 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C043 — USPS business mailboxes 257, 932 homes
- Route C002 — USPS business mailboxes 219, 1,153 homes
- Route C010 — USPS business mailboxes 218, 394 homes
- Route C038 — USPS business mailboxes 161, 608 homes
- Route C020 — USPS business mailboxes 121, 591 homes
Select these 5 routes on the route map
Every carrier route in 90731
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C001 | City | 748 | 6 | $132,747 | — | — | — |
| C002 | City | 1,153 | 219 | $94,353 | — | — | — |
| C003 | City | 656 | 1 | $53,085 | — | — | — |
| C004 | City | 709 | 24 | $53,085 | — | — | — |
| C005 | City | 579 | 32 | $48,228 | — | — | — |
| C006 | City | 694 | 13 | $58,846 | — | — | — |
| C007 | City | 710 | 33 | $58,846 | — | — | — |
| C008 | City | 853 | 39 | $58,825 | — | — | — |
| C009 | City | 609 | 30 | $52,674 | — | — | — |
| C010 | City | 394 | 218 | $149,131 | — | — | — |
| C011 | City | 697 | 5 | $100,156 | — | — | — |
| C012 | City | 643 | 1 | $53,085 | — | — | — |
| C013 | City | 644 | 1 | $16,319 | — | — | — |
| C014 | City | 694 | 5 | $92,511 | — | — | — |
| C016 | City | 589 | 38 | $78,827 | — | — | — |
| C017 | City | 533 | 29 | $47,784 | — | — | — |
| C018 | City | 511 | 41 | $47,784 | — | — | — |
| C019 | City | 620 | 47 | $67,795 | — | — | — |
| C020 | City | 591 | 121 | $53,085 | — | — | — |
| C021 | City | 368 | 4 | $132,747 | — | — | — |
| C022 | City | 736 | 3 | $100,156 | — | — | — |
| C024 | City | 628 | 2 | $78,827 | — | — | — |
| C025 | City | 565 | 2 | $111,094 | — | — | — |
| C026 | City | 570 | 81 | $63,645 | — | — | — |
| C027 | City | 558 | 5 | $113,660 | — | — | — |
| C028 | City | 850 | 5 | $55,093 | — | — | — |
| C030 | City | 382 | 3 | $149,131 | — | — | — |
| C031 | City | 361 | 1 | $166,157 | — | — | — |
| C032 | City | 492 | 2 | $200,001+ | — | — | — |
| C035 | City | 558 | 0 | $157,773 | — | — | — |
| C036 | City | 650 | 0 | $111,094 | — | — | — |
| C037 | City | 487 | 12 | $47,197 | — | — | — |
| C038 | City | 608 | 161 | $63,645 | — | — | — |
| C039 | City | 751 | 11 | $39,189 | — | — | — |
| C040 | City | 470 | 1 | $124,142 | — | — | — |
| C041 | City | 513 | 91 | $49,444 | — | — | — |
| C042 | City | 783 | 25 | $58,846 | — | — | — |
| C043 | City | 932 | 257 | $51,131 | — | — | — |
| C044 | City | 492 | 0 | $121,511 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 90731 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
- 90732 — Los Angeles city, CA (2.1 mi)
- 90744 — Los Angeles city, CA (3.3 mi)
- 90802 — Long Beach city, CA (4.3 mi)
- 90710 — Los Angeles city, CA (4.8 mi)
- 90717 — Lomita city, CA (4.8 mi)
- 90831 — Long Beach city, CA (5.1 mi)
- 90275 — Rancho Palos Verdes city, CA (5.4 mi)
- 90813 — Long Beach city, CA (5.8 mi)
Areas that include 90731
- Los Angeles, CA ZIP codes — 123 ZIP codes
- San Pedro, CA ZIP codes — 2 ZIP codes
- Los Angeles County ZIP codes — 298 ZIP codes
- California ZIP code data
Mail every home in 90731
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.
Los Angeles EDDM mailing
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 90731, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 90731 in?
- 90731 is a San Pedro, CA mailing address. By land area, 98% lies inside Los Angeles and 1% lies inside Long Beach.
- What county is 90731 in?
- 90731 is in Los Angeles County.
- What is the population of 90731?
- About 61,944 people (±2,512), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 61,270.
- What is the median household income in 90731?
- $76,395 (±$4,995), 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 90731?
- 39 USPS carrier routes with 24,381 residential and 1,569 business mailboxes (25,949 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 90731?
- The closest, measured center to center: 90732 (2.1 mi, Los Angeles), 90744 (3.3 mi, Los Angeles), 90802 (4.3 mi, Long Beach), 90710 (4.8 mi, Los Angeles), 90717 (4.8 mi, Lomita) and 90831 (5.1 mi, Long Beach).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.