18020 ZIP Code, Bethlehem, PA
18020 is a ZIP code in Bethlehem, Pennsylvania in Northampton County. It covers 13 square miles of land. The closest ZIP codes are 18045, 18017 and 18018. 21,204 people live here in 7,791 households. At about 1,629 people per square mile it has suburban density, and most homes are owner-occupied (86%). Median household income is $126,166, well above the Pennsylvania median of $77,971.
Quick facts
- Mailing city: Bethlehem, PA
- County: Northampton County
- Land area: 13 sq mi
- Population: 21,204
- Median household income: $126,166
- Carrier routes: 18 (8,347 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 21,204 |
| Households | 7,791 |
| Median household income | $126,166 |
| Income per person | $56,266 |
| Median age | 42.8 |
| Homeowners | 85.8% |
| Median home value | $370,200 |
| Median rent | $1,534 |
| Bachelor's degree or higher | 42.7% |
| Average commute (minutes) | 25.9 |
| Households with kids under 18 | 30.4% |
| Moved in the past year | 7.1% |
| Below the poverty line | 5.0% |
| Broadband internet | 94.8% |
| Speak a non-English language at home | 15.0% |
Household income
| % of households | Value |
|---|---|
| <$10K | 2.1% |
| $10–15K | 1.0% |
| $15–25K | 2.4% |
| $25–35K | 3.3% |
| $35–50K | 7.8% |
| $50–75K | 12.2% |
| $75–100K | 10.9% |
| $100–150K | 21.3% |
| $150–200K | 17.9% |
| $200K+ | 21.1% |
Age
| % of all residents | Value |
|---|---|
| <10 | 9.7% |
| 10–19 | 12.7% |
| 20–24 | 6.1% |
| 25–34 | 11.5% |
| 35–44 | 11.8% |
| 45–54 | 12.2% |
| 55–64 | 14.3% |
| 65–74 | 12.3% |
| 75+ | 9.3% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 51.9% |
| Owned outright | 32.6% |
| Rented | 13.4% |
| Vacant | 2.1% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 80.1% |
| Townhome | 11.6% |
| 2–4 units | 2.4% |
| 5–19 units | 3.5% |
| 20+ units | 2.2% |
| Mobile / other | 0.1% |
Businesses in 18020
520 business establishments with 10,490 employees (ZIP Codes Business Patterns 2023).
- Health Care and Social Assistance: 69
- Retail Trade: 59
- Construction: 48
- Professional, Scientific, and Technical Services: 45
- Other Services (except Public Administration): 45
- Transportation and Warehousing: 42
- Accommodation and Food Services: 41
- Finance and Insurance: 32
EDDM carrier routes
18020 has 18 USPS carrier routes with 8,347 residential and 632 business mailboxes. Open the EDDM route map.
Carrier routes in 18020
18020 has 18 USPS carrier routes (12 city (C), 6 rural (R)) with 8,347 residential and 632 business mailboxes. Routes range from 116 homes (R018) to 667 homes (R021); the median route has 490 homes. The Census counted 7,791 households in 18020 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 1 |
| 250–499 | 9 |
| 500–749 | 8 |
| 750–999 | 0 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 18020 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route R018 — USPS business mailboxes 191, 116 homes
- Route R011 — USPS business mailboxes 155, 357 homes
- Route C085 — USPS business mailboxes 93, 273 homes
- Route R002 — USPS business mailboxes 45, 382 homes
- Route C074 — USPS business mailboxes 26, 500 homes
Select these 5 routes on the route map
Every carrier route in 18020
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C003 | City | 520 | 1 | $154,139 | — | — | — |
| C010 | City | 526 | 5 | $98,712 | — | — | — |
| C050 | City | 457 | 1 | $154,139 | — | — | — |
| C051 | City | 455 | 0 | $118,443 | — | — | — |
| C064 | City | 482 | 19 | $54,925 | — | — | — |
| C074 | City | 500 | 26 | $63,196 | — | — | — |
| C079 | City | 531 | 0 | $98,005 | — | — | — |
| C081 | City | 474 | 23 | $88,721 | — | — | — |
| C084 | City | 604 | 22 | $54,925 | — | — | — |
| C085 | City | 273 | 93 | $113,991 | — | — | — |
| C095 | City | 417 | 2 | $113,991 | — | — | — |
| C096 | City | 497 | 19 | $118,443 | — | — | — |
| R001 | Rural | 545 | 19 | $147,360 | — | — | — |
| R002 | Rural | 382 | 45 | $116,945 | — | — | — |
| R011 | Rural | 357 | 155 | $108,064 | — | — | — |
| R012 | Rural | 544 | 0 | $154,139 | — | — | — |
| R018 | Rural | 116 | 191 | $111,853 | — | — | — |
| R021 | Rural | 667 | 11 | $111,853 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 18020 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
- 18045 — Palmer Heights CDP, PA (3.1 mi)
- 18017 — Bethlehem city, PA (3.3 mi)
- 18018 — Bethlehem city, PA (4.7 mi)
- 18042 — Easton city, PA (5.6 mi)
- 18055 — Hellertown borough, PA (5.7 mi)
- 18064 — Eastlawn Gardens CDP, PA (5.9 mi)
- 18085 — Tatamy borough, PA (6.1 mi)
- 18015 — Bethlehem city, PA (6.2 mi)
Areas that include 18020
- Bethlehem, PA ZIP codes — 4 ZIP codes
- Middletown (Northampton County), PA ZIP codes — 1 ZIP code
- Northampton County ZIP codes — 24 ZIP codes
- Pennsylvania ZIP code data
Where it ranks
- No. 1 of 19: highest median household income in Northampton County
- No. 2 of 19: highest median home value in Northampton County
- No. 4 of 19: highest share of owner-occupied homes in Northampton County
- No. 4 of 19: highest share of households with children in Northampton County
Mail every home in 18020
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) 18020, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 18020 in?
- 18020 is a Bethlehem, PA mailing address. By land area, 20% lies inside Middletown; the rest is outside any Census-defined city or community.
- What county is 18020 in?
- 18020 is in Northampton County.
- What is the population of 18020?
- About 21,204 people (±799), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 20,582.
- What is the median household income in 18020?
- $126,166 (±$9,526), 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 18020?
- 18 USPS carrier routes with 8,347 residential and 632 business mailboxes (8,979 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 18020?
- The closest, measured center to center: 18045 (3.1 mi, Palmer Heights), 18017 (3.3 mi, Bethlehem), 18018 (4.7 mi, Bethlehem), 18042 (5.6 mi, Easton), 18055 (5.7 mi, Hellertown borough, PA) and 18064 (5.9 mi, Eastlawn Gardens).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.