18018 ZIP Code, Bethlehem, PA
18018 is a ZIP code in Bethlehem, Pennsylvania — mostly in Lehigh County (66% of its land), with smaller parts in Northampton County. It covers 5.2 square miles of land. The closest ZIP codes are 18017, 18109 and 18015. 32,965 people live here in 14,119 households, more than in 9 of every 10 Pennsylvania ZIP codes. At about 6,374 people per square mile it is built up to city-neighborhood density, and owners and renters are mixed (53% own). Median household income is $75,417, close to the Pennsylvania median of $77,971.
Quick facts
- Mailing city: Bethlehem, PA
- County: Lehigh County
- Land area: 5.2 sq mi
- Population: 32,965
- Median household income: $75,417
- Carrier routes: 28 (15,396 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 32,965 |
| Households | 14,119 |
| Median household income | $75,417 |
| Income per person | $48,627 |
| Median age | 39.2 |
| Homeowners | 53.2% |
| Median home value | $250,900 |
| Median rent | $1,364 |
| Bachelor's degree or higher | 38.8% |
| Average commute (minutes) | 21.1 |
| Households with kids under 18 | 20.6% |
| Moved in the past year | 14.1% |
| Below the poverty line | 15.2% |
| Broadband internet | 89.5% |
| Speak a non-English language at home | 17.9% |
Household income
| % of households | Value |
|---|---|
| <$10K | 4.2% |
| $10–15K | 3.7% |
| $15–25K | 7.2% |
| $25–35K | 7.4% |
| $35–50K | 11.9% |
| $50–75K | 15.3% |
| $75–100K | 14.9% |
| $100–150K | 18.8% |
| $150–200K | 8.9% |
| $200K+ | 7.8% |
Age
| % of all residents | Value |
|---|---|
| <10 | 7.1% |
| 10–19 | 12.5% |
| 20–24 | 9.0% |
| 25–34 | 15.5% |
| 35–44 | 14.6% |
| 45–54 | 11.1% |
| 55–64 | 11.5% |
| 65–74 | 10.4% |
| 75+ | 8.2% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 35.0% |
| Owned outright | 17.6% |
| Rented | 44.2% |
| Vacant | 3.1% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 33.6% |
| Townhome | 28.7% |
| 2–4 units | 15.7% |
| 5–19 units | 12.4% |
| 20+ units | 9.5% |
| Mobile / other | 0.2% |
Businesses in 18018
776 business establishments with 12,363 employees (ZIP Codes Business Patterns 2023).
- Other Services (except Public Administration): 114
- Health Care and Social Assistance: 103
- Professional, Scientific, and Technical Services: 101
- Accommodation and Food Services: 92
- Retail Trade: 85
- Finance and Insurance: 69
- Construction: 53
- Real Estate and Rental and Leasing: 40
EDDM carrier routes
18018 has 28 USPS carrier routes with 15,396 residential and 1,190 business mailboxes. Open the EDDM route map.
Carrier routes in 18018
18018 has 28 USPS carrier routes (28 city (C)) with 15,396 residential and 1,190 business mailboxes. Routes range from 362 homes (C061) to 824 homes (C032); the median route has 519 homes. The Census counted 14,119 households in 18018 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 11 |
| 500–749 | 15 |
| 750–999 | 2 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 18018 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route C034 — USPS business mailboxes 158, 733 homes
- Route C036 — USPS business mailboxes 157, 416 homes
- Route C084 — USPS business mailboxes 152, 644 homes
- Route C042 — USPS business mailboxes 117, 491 homes
- Route C046 — USPS business mailboxes 93, 450 homes
Select these 5 routes on the route map
Every carrier route in 18018
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| C032 | City | 824 | 9 | $67,411 | — | — | — |
| C033 | City | 470 | 5 | $60,311 | — | — | — |
| C034 | City | 733 | 158 | $52,411 | — | — | — |
| C036 | City | 416 | 157 | $51,304 | — | — | — |
| C037 | City | 509 | 11 | $52,190 | — | — | — |
| C038 | City | 549 | 28 | $52,190 | — | — | — |
| C040 | City | 488 | 15 | $67,411 | — | — | — |
| C041 | City | 425 | 16 | $86,529 | — | — | — |
| C042 | City | 491 | 117 | $90,573 | — | — | — |
| C044 | City | 656 | 23 | $52,190 | — | — | — |
| C046 | City | 450 | 93 | $86,529 | — | — | — |
| C048 | City | 636 | 1 | $105,320 | — | — | — |
| C050 | City | 435 | 46 | $90,573 | — | — | — |
| C051 | City | 649 | 49 | $63,655 | — | — | — |
| C052 | City | 644 | 42 | $86,993 | — | — | — |
| C053 | City | 408 | 6 | $67,411 | — | — | — |
| C054 | City | 629 | 9 | $86,993 | — | — | — |
| C055 | City | 445 | 1 | $105,320 | — | — | — |
| C056 | City | 402 | 6 | $73,227 | — | — | — |
| C057 | City | 598 | 42 | $52,411 | — | — | — |
| C058 | City | 512 | 3 | $63,655 | — | — | — |
| C061 | City | 362 | 41 | $86,529 | — | — | — |
| C080 | City | 526 | 20 | $53,057 | — | — | — |
| C082 | City | 502 | 59 | $101,896 | — | — | — |
| C083 | City | 613 | 14 | $54,686 | — | — | — |
| C084 | City | 644 | 152 | $39,975 | — | — | — |
| C087 | City | 576 | 35 | $86,529 | — | — | — |
| C088 | City | 804 | 32 | $50,259 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 18018 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
- 18017 — Bethlehem city, PA (2.3 mi)
- 18109 — Allentown city, PA (2.5 mi)
- 18015 — Bethlehem city, PA (3.2 mi)
- 18101 — Allentown city, PA (4.2 mi)
- 18032 — Catasauqua borough, PA (4.3 mi)
- 18102 — Allentown city, PA (4.4 mi)
- 18020 — Middletown CDP, PA (4.7 mi)
- 18055 — Hellertown borough, PA (5.4 mi)
Areas that include 18018
- Bethlehem, PA ZIP codes — 4 ZIP codes
- Lehigh County ZIP codes — 32 ZIP codes
- Northampton County ZIP codes — 24 ZIP codes
- Pennsylvania ZIP code data
Where it ranks
- No. 7 of 26: highest share of residents who moved in during the past year in Lehigh County
- No. 8 of 26: lowest median age in Lehigh County
Mail every home in 18018
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) 18018, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 18018 in?
- 18018 is a Bethlehem, PA mailing address. By land area, 98% lies inside Bethlehem.
- What county is 18018 in?
- 18018 is mostly in Lehigh County (66% of its land), with smaller parts in Northampton County.
- What is the population of 18018?
- About 32,965 people (±1,179), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 32,388.
- What is the median household income in 18018?
- $75,417 (±$4,866), 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 18018?
- 28 USPS carrier routes with 15,396 residential and 1,190 business mailboxes (16,588 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 18018?
- The closest, measured center to center: 18017 (2.3 mi, Bethlehem), 18109 (2.5 mi, Allentown), 18015 (3.2 mi, Bethlehem), 18101 (4.2 mi, Allentown), 18032 (4.3 mi, Catasauqua borough, PA) and 18102 (4.4 mi, Allentown).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.