18631 ZIP Code, Mifflinville, PA
18631 is a ZIP code in Mifflinville, Pennsylvania in Columbia County. It covers 1.4 square miles of land. The closest ZIP codes are 18603, 18635 and 17815. 1,100 people live here in 517 households. With about 774 people per square mile it is lightly settled, and most homes are owner-occupied (78%). Median household income is $46,125, well below the Pennsylvania median of $77,971; the median age is 47.0, older than most ZIP codes.
Quick facts
- Mailing city: Mifflinville, PA
- County: Columbia County
- Land area: 1.4 sq mi
- Population: 1,100
- Median household income: $46,125
Key figures
| Measure | Value |
|---|---|
| Residents | 1,100 |
| Households | 517 |
| Median household income | $46,125 |
| Income per person | $29,601 |
| Median age | 47 |
| Homeowners | 78.3% |
| Median home value | $214,100 |
| Median rent | $959 |
| Bachelor's degree or higher | 29.6% |
| Average commute (minutes) | 21.3 |
| Households with kids under 18 | 15.3% |
| Moved in the past year | 5.0% |
| Below the poverty line | 14.2% |
| Broadband internet | 67.5% |
| Speak a non-English language at home | 0.0% |
Household income
| % of households | Value |
|---|---|
| <$10K | 14.9% |
| $10–15K | 9.9% |
| $15–25K | 15.1% |
| $25–35K | 4.1% |
| $35–50K | 9.7% |
| $50–75K | 11.0% |
| $75–100K | 2.1% |
| $100–150K | 28.4% |
| $150–200K | 4.8% |
| $200K+ | 0.0% |
Age
| % of all residents | Value |
|---|---|
| <10 | 12.8% |
| 10–19 | 7.8% |
| 20–24 | 2.3% |
| 25–34 | 13.7% |
| 35–44 | 9.4% |
| 45–54 | 20.0% |
| 55–64 | 9.1% |
| 65–74 | 12.1% |
| 75+ | 12.8% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 33.1% |
| Owned outright | 43.3% |
| Rented | 20.6% |
| Vacant | 2.9% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 93.8% |
| Townhome | 6.2% |
| 2–4 units | 0.0% |
| 5–19 units | 0.0% |
| 20+ units | 0.0% |
| Mobile / other | 0.0% |
Businesses in 18631
27 business establishments with 335 employees (ZIP Codes Business Patterns 2023).
- Construction: 5
- Accommodation and Food Services: 5
- Retail Trade: 4
- Health Care and Social Assistance: 3
EDDM carrier routes
See every USPS carrier route in 18631 with residential and business mailbox counts on the route map. Open the EDDM route map.
Nearby ZIP codes
- 18603 — Berwick borough, PA (4.6 mi)
- 18635 — Nescopeck borough, PA (5.3 mi)
- 17815 — Bloomsburg town, PA (6.6 mi)
- 18246 (7.6 mi)
- 17859 — Rohrsburg CDP, PA (7.8 mi)
- 17985 — Nuremberg CDP, PA (8.4 mi)
- 18241 — Nuremberg CDP, PA (9.3 mi)
- 17878 — Stillwater borough, PA (10.1 mi)
Areas that include 18631
- Mifflinville, PA ZIP codes — 1 ZIP code
- Columbia County ZIP codes — 15 ZIP codes
- Pennsylvania ZIP code data
Mail every home in 18631
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) 18631, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 18631 in?
- 18631 is a Mifflinville, PA mailing address. By land area, 89% lies inside Mifflinville; the rest is outside any Census-defined city or community.
- What county is 18631 in?
- 18631 is in Columbia County.
- What is the population of 18631?
- About 1,100 people (±289), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 1,122.
- What is the median household income in 18631?
- $46,125 (±$17,333), 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 18631?
- EDDM2GO's stored route library does not include 18631 yet. The EDDM route map loads its carrier routes and mailbox counts when you search the ZIP code.
- What ZIP codes are near 18631?
- The closest, measured center to center: 18603 (4.6 mi, Berwick borough, PA), 18635 (5.3 mi, Nescopeck borough, PA), 17815 (6.6 mi, Bloomsburg), 18246 (7.6 mi), 17859 (7.8 mi, Rohrsburg) and 17985 (8.4 mi, Nuremberg).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.