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US ZIP Code Profile

ZIP Code 18966
Southampton, Pennsylvania

ZIP code 18966 is in Southampton, located in Bucks County, Pennsylvania, within the Philadelphia-Camden-Wilmington metro area. Its 2020 Census population was 38,079. The estimated median adjusted gross income per tax return is $74,675, and about 14% of filers report $200,000 or more.

2020 Population
38,079
Census ZCTA
County
Bucks
FIPS 42017
Median income (est.)
$74,675
IRS SOI 2022
Land Area
16.226 mi²
+ 0.313 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CitySouthampton, PA
CountyBucks County (FIPS 42017)
StatePennsylvania (FIPS 42)
Metro Area (MSA)Philadelphia-Camden-Wilmington, PA-NJ-DE-MD Metro Area (37980)
Census Region / DivisionNortheast Region · Middle Atlantic Division
Coordinates40.18847, -75.009895
Land / Water Area16.226 mi² land · 0.313 mi² water

02Income & Economics

Distribution of the 20,170 individual tax returns filed in 18966 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
21.8%
$25K–$50K
15.0%
$50K–$75K
13.3%
$75K–$100K
10.5%
$100K–$200K
25.4%
$200K+
14.0%
The $200,000+ bracket accounts for 48% of 18966's total adjusted gross income, from 14% of returns — a concentration that drives the gap between the median ($74,675) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 18966's IRS income metrics, 2020–2022.

Median income (2021→2022)
$74,675
▲ 1.1%
Filers earning $200K+
14.0%
▲ 0.7 pt
Total filers
20,170
▲ 0.3%
GET /zipc/v2/zipcodes/18966/soi?year=… $67K 2020 $74K 2021 $75K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 18966 ZCTA.

2000
39,779
 
2010
37,999
▼ -4.5%
2020
38,079
▲ +0.2%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 18966. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 18966

Southampton and its immediate neighbors, sorted by distance.

3 mi
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Distance from 18966 to any ZIP

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06USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number417920
City AliasesSouthampton, Churchville, Holland

07Frequently Asked Questions

What county is ZIP code 18966 in?

ZIP code 18966 is in Bucks County, Pennsylvania (county FIPS code 42017).

What city is ZIP code 18966?

The primary USPS city for 18966 is Southampton, PA.

What metro area (MSA) is 18966 in?

18966 is part of the Philadelphia-Camden-Wilmington, PA-NJ-DE-MD Metro Area (MSA code 37980).

What is the population of ZIP code 18966?

The 2020 Census population of 18966 was 38,079 residents.

What is the median income in ZIP code 18966?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 18966 is about $74,675, with around 14% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.