00921 ZIP Code, San Juan, PR
00921 is a ZIP code in San Juan, Puerto Rico in San Juan Municipio. It covers 3.1 square miles of land. The closest ZIP codes are 00927, 00968 and 00966. 33,119 people live here in 14,422 households. It is densely built, at about 10,791 people per square mile, and owners and renters are mixed (45% own). Median household income is $23,598, below the Puerto Rico median of $26,297.
Quick facts
- Mailing city: San Juan, PR
- County: San Juan County
- Land area: 3.1 sq mi
- Population: 33,119
- Median household income: $23,598
- Carrier routes: 15 (12,943 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 33,119 |
| Households | 14,422 |
| Median household income | $23,598 |
| Income per person | $19,231 |
| Median age | 42.1 |
| Homeowners | 45.4% |
| Median home value | $148,600 |
| Median rent | $584 |
| Bachelor's degree or higher | 0.0% |
| Average commute (minutes) | 23.8 |
| Households with kids under 18 | not published |
| Moved in the past year | not published |
| Below the poverty line | 46.9% |
| Broadband internet | not published |
| Speak a non-English language at home | not published |
Household income
| % of households | Value |
|---|---|
| <$10K | 24.8% |
| $10–15K | 9.9% |
| $15–25K | 17.8% |
| $25–35K | 10.1% |
| $35–50K | 11.1% |
| $50–75K | 12.9% |
| $75–100K | 6.2% |
| $100–150K | 3.9% |
| $150–200K | 1.7% |
| $200K+ | 1.8% |
Age
| % of all residents | Value |
|---|---|
| <10 | 9.7% |
| 10–19 | 10.8% |
| 20–24 | 7.5% |
| 25–34 | 13.8% |
| 35–44 | 11.0% |
| 45–54 | 12.9% |
| 55–64 | 12.8% |
| 65–74 | 10.4% |
| 75+ | 11.0% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 20.3% |
| Owned outright | 16.9% |
| Rented | 44.6% |
| Vacant | 18.2% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 46.4% |
| Townhome | 13.8% |
| 2–4 units | 10.6% |
| 5–19 units | 12.5% |
| 20+ units | 16.4% |
| Mobile / other | 0.3% |
EDDM carrier routes
00921 has 15 USPS carrier routes with 12,943 residential and 1,203 business mailboxes. Open the EDDM route map.
Carrier routes in 00921
00921 has 15 USPS carrier routes (15 city (C)) with 12,943 residential and 1,203 business mailboxes. Routes range from 476 homes (C059) to 1,558 homes (C065); the median route has 753 homes. The Census counted 14,422 households in 00921 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 1 |
| 500–749 | 6 |
| 750–999 | 5 |
| 1,000–1,499 | 1 |
| 1,500+ | 2 |
Best routes in 00921 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C031 — USPS business mailboxes 274, 701 homes
- Route C064 — USPS business mailboxes 224, 945 homes
- Route C059 — USPS business mailboxes 216, 476 homes
- Route C038 — USPS business mailboxes 104, 671 homes
- Route C040 — USPS business mailboxes 71, 1,533 homes
Select these 5 routes on the route map
Every carrier route in 00921
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C031 | City | 701 | 274 | — | — | — | — |
| C035 | City | 753 | 25 | — | — | — | — |
| C038 | City | 671 | 104 | — | — | — | — |
| C040 | City | 1,533 | 71 | — | — | — | — |
| C041 | City | 904 | 54 | — | — | — | — |
| C043 | City | 619 | 3 | — | — | — | — |
| C045 | City | 628 | 56 | — | — | — | — |
| C047 | City | 713 | 13 | — | — | — | — |
| C049 | City | 848 | 11 | — | — | — | — |
| C050 | City | 600 | 38 | — | — | — | — |
| C052 | City | 958 | 20 | — | — | — | — |
| C055 | City | 1,036 | 62 | — | — | — | — |
| C059 | City | 476 | 216 | — | — | — | — |
| C064 | City | 945 | 224 | — | — | — | — |
| C065 | City | 1,558 | 32 | — | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 00921 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
- 00927 — San Juan zona urbana, PR (1.2 mi)
- 00968 — Guaynabo zona urbana, PR (1.3 mi)
- 00966 — Guaynabo zona urbana, PR (1.8 mi)
- 00920 — San Juan zona urbana, PR (2.1 mi)
- 00969 — Guaynabo zona urbana, PR (2.3 mi)
- 00918 — San Juan zona urbana, PR (2.4 mi)
- 00925 — San Juan zona urbana, PR (2.5 mi)
- 00934 — Guaynabo zona urbana, PR (2.6 mi)
Areas that include 00921
- San Juan, PR ZIP codes — 18 ZIP codes
- San Juan County ZIP codes — 18 ZIP codes
- Puerto Rico ZIP code data
Where it ranks
- No. 3 of 17: lowest median age in San Juan Municipio
- No. 3 of 17: fastest population growth in San Juan Municipio
- No. 3 of 17: lowest median age in San Juan, PR
- No. 3 of 17: fastest population growth in San Juan, PR
Mail every home in 00921
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) 00921, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 00921 in?
- 00921 is a San Juan, PR mailing address. By land area, 100% lies inside San Juan zona urbana.
- What county is 00921 in?
- 00921 is in San Juan Municipio.
- What is the population of 00921?
- About 33,119 people (±2,105), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 32,062.
- What is the median household income in 00921?
- $23,598 (±$1,589), compared with $26,297 for Puerto Rico as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 00921?
- 15 USPS carrier routes with 12,943 residential and 1,203 business mailboxes (14,199 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 00921?
- The closest, measured center to center: 00927 (1.2 mi, San Juan zona urbana, PR), 00968 (1.3 mi, Guaynabo zona urbana, PR), 00966 (1.8 mi, Guaynabo zona urbana, PR), 00920 (2.1 mi, San Juan zona urbana, PR), 00969 (2.3 mi, Guaynabo zona urbana, PR) and 00918 (2.4 mi, San Juan zona urbana, PR).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.