15321 ZIP Code, Cecil, PA
15321 is a ZIP code in Cecil, Pennsylvania — mostly in Washington County (86% of its land), with smaller parts in Allegheny County. It covers 1.9 square miles of land. The closest ZIP codes are 15350, 15031 and 15064. 2,025 people live here in 760 households. At about 1,061 people per square mile it has suburban density, and most homes are owner-occupied (76%). Median household income is $117,656, well above the Pennsylvania median of $77,971; the median age is 29.5, younger than most ZIP codes.
Quick facts
- Mailing city: Cecil, PA
- County: Washington County
- Land area: 1.9 sq mi
- Population: 2,025
- Median household income: $117,656
- Carrier routes: 2 (748 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 2,025 |
| Households | 760 |
| Median household income | $117,656 |
| Income per person | $54,240 |
| Median age | 29.5 |
| Homeowners | 75.8% |
| Median home value | $348,700 |
| Median rent | $1,465 |
| Bachelor's degree or higher | 54.2% |
| Average commute (minutes) | 23.5 |
| Households with kids under 18 | 33.2% |
| Moved in the past year | 22.7% |
| Below the poverty line | 3.5% |
| Broadband internet | 96.3% |
| Speak a non-English language at home | 3.1% |
Household income
| % of households | Value |
|---|---|
| <$10K | 1.4% |
| $10–15K | 2.0% |
| $15–25K | 3.9% |
| $25–35K | 0.0% |
| $35–50K | 7.6% |
| $50–75K | 12.9% |
| $75–100K | 18.8% |
| $100–150K | 24.3% |
| $150–200K | 15.0% |
| $200K+ | 13.9% |
Age
| % of all residents | Value |
|---|---|
| <10 | 12.4% |
| 10–19 | 12.1% |
| 20–24 | 18.4% |
| 25–34 | 10.4% |
| 35–44 | 12.0% |
| 45–54 | 11.3% |
| 55–64 | 9.0% |
| 65–74 | 9.7% |
| 75+ | 4.7% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 37.0% |
| Owned outright | 26.9% |
| Rented | 19.5% |
| Vacant | 16.5% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 72.8% |
| Townhome | 9.0% |
| 2–4 units | 2.8% |
| 5–19 units | 6.9% |
| 20+ units | 0.0% |
| Mobile / other | 8.5% |
Businesses in 15321
45 business establishments with 206 employees (ZIP Codes Business Patterns 2023).
- Construction: 14
- Other Services (except Public Administration): 8
- Accommodation and Food Services: 5
- Health Care and Social Assistance: 4
- Administrative and Support and Waste Management and Remediation Services: 3
EDDM carrier routes
15321 has 2 USPS carrier routes with 748 residential and 39 business mailboxes. Open the EDDM route map.
Carrier routes in 15321
15321 has 2 USPS carrier routes (2 rural (R)) with 748 residential and 39 business mailboxes. Routes range from 143 homes (R002) to 605 homes (R001); the median route has 374 homes. The Census counted 760 households in 15321 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 1 |
| 250–499 | 0 |
| 500–749 | 1 |
| 750–999 | 0 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 15321 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route R001 — USPS business mailboxes 34, 605 homes
- Route R002 — USPS business mailboxes 5, 143 homes
Select these 2 routes on the route map
Every carrier route in 15321
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| R001 | Rural | 605 | 34 | $102,650 | — | — | — |
| R002 | Rural | 143 | 5 | $106,879 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 15321 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
- 15350 — Muse CDP, PA (2.1 mi)
- 15031 (2.2 mi)
- 15064 (3.1 mi)
- 15317 — McMurray CDP, PA (3.2 mi)
- 15017 — Bridgeville borough, PA (3.4 mi)
- 15055 — Lawrence CDP, PA (3.5 mi)
- 15057 — Sturgeon CDP, PA (3.9 mi)
- 15361 — Southview CDP, PA (4 mi)
Areas that include 15321
- Cecil-Bishop, PA ZIP codes — 3 ZIP codes
- Cecil, PA ZIP codes — 1 ZIP code
- Allegheny County ZIP codes — 112 ZIP codes
- Washington County ZIP codes — 58 ZIP codes
- Pennsylvania ZIP code data
Where it ranks
- No. 3 of 30: highest median household income in Washington County
- No. 5 of 30: highest median home value in Washington County
- No. 4 of 30: highest share of households with children in Washington County
- No. 2 of 30: highest share of residents who moved in during the past year in Washington County
- No. 2 of 30: lowest median age in Washington County
- No. 1 of 28: fastest population growth in Washington County
Mail every home in 15321
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) 15321, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 15321 in?
- 15321 is a Cecil, PA mailing address. By land area, 81% lies inside Cecil-Bishop; the rest is outside any Census-defined city or community.
- What county is 15321 in?
- 15321 is mostly in Washington County (86% of its land), with smaller parts in Allegheny County.
- What is the population of 15321?
- About 2,025 people (±510), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 1,792.
- What is the median household income in 15321?
- $117,656 (±$43,489), compared with $77,971 for Pennsylvania as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 15321?
- 2 USPS carrier routes with 748 residential and 39 business mailboxes (787 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 15321?
- The closest, measured center to center: 15350 (2.1 mi, Muse), 15031 (2.2 mi), 15064 (3.1 mi), 15317 (3.2 mi, McMurray), 15017 (3.4 mi, Bridgeville borough, PA) and 15055 (3.5 mi, Lawrence).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.