18966 ZIP Code, Southampton, PA

18966 is a ZIP code in Southampton, Pennsylvania in Bucks County. It covers 16 square miles of land. The closest ZIP codes are 18954, 19053 and 18974. 36,370 people live here in 13,851 households, more than in 9 of every 10 Pennsylvania ZIP codes. At about 2,231 people per square mile it has suburban density, and most homes are owner-occupied (90%). Median household income is $128,838, well above the Pennsylvania median of $77,971; the median age is 47.3, older than most ZIP codes.

Quick facts

Key figures

MeasureValue
Residents36,370
Households13,851
Median household income$128,838
Income per person$64,311
Median age47.3
Homeowners89.5%
Median home value$488,400
Median rent$1,971
Bachelor's degree or higher50.9%
Average commute (minutes)31.5
Households with kids under 1826.5%
Moved in the past year6.0%
Below the poverty line3.9%
Broadband internet95.9%
Speak a non-English language at home14.3%

Household income

% of householdsValue
<$10K3.7%
$10–15K0.6%
$15–25K2.1%
$25–35K4.2%
$35–50K5.4%
$50–75K11.2%
$75–100K12.4%
$100–150K18.5%
$150–200K13.7%
$200K+28.3%

Age

% of all residentsValue
<1010.2%
10–1911.6%
20–245.3%
25–349.0%
35–4411.4%
45–5412.4%
55–6415.1%
65–7414.8%
75+10.1%

Tenure

% of housing unitsValue
Owned, with mortgage55.8%
Owned outright30.9%
Rented9.8%
Vacant3.5%

Type of building

% of housing unitsValue
Detached house72.3%
Townhome13.5%
2–4 units2.5%
5–19 units7.3%
20+ units4.2%
Mobile / other0.3%

Businesses in 18966

1,197 business establishments with 10,602 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

18966 has 33 USPS carrier routes with 14,640 residential and 733 business mailboxes. Open the EDDM route map.

Carrier routes in 18966

18966 has 33 USPS carrier routes (33 city (C)) with 14,640 residential and 733 business mailboxes. Routes range from 217 homes (C049) to 720 homes (C020); the median route has 421 homes. The Census counted 13,851 households in 18966 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per routeRoutes
1–2491
250–49927
500–7495
750–9990
1,000–1,4990
1,500+0

Best routes in 18966 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

  1. Route C049 — USPS business mailboxes 214, 217 homes
  2. Route C053 — USPS business mailboxes 116, 421 homes
  3. Route C012 — USPS business mailboxes 78, 344 homes
  4. Route C031 — USPS business mailboxes 74, 445 homes
  5. Route C047 — USPS business mailboxes 66, 461 homes

Select these 5 routes on the route map

Every carrier route in 18966

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
C003City4170$106,154———
C006City4567$127,944———
C007City61718$168,974———
C008City3891$181,157———
C009City4064$127,944———
C010City39416$106,617———
C012City34478$106,617———
C013City4844$157,692———
C014City4035$92,152———
C015City46545$69,718———
C017City3702$143,544———
C018City4052$158,960———
C019City4531$81,082———
C020City7202$121,196———
C025City3876$130,894———
C026City5914$127,944———
C027City5741$150,764———
C028City3731$200,001+———
C031City44574$92,152———
C032City5860$108,662———
C033City4911$108,662———
C034City4003$106,617———
C035City4210$143,798———
C037City4211$121,410———
C039City4600$164,270———
C040City4520$158,924———
C042City40720$131,890———
C044City4070$200,001+———
C047City46166$92,152———
C049City217214$129,746———
C050City36332————
C051City4409$130,894———
C053City421116$92,152———

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 18966 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

Areas that include 18966

Where it ranks

Mail every home in 18966

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) 18966, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 18966 in?
18966 is a Southampton, PA mailing address. By land area, 13% lies inside Churchville and 7% lies inside Village Shires; the rest is outside any Census-defined city or community.
What county is 18966 in?
18966 is in Bucks County.
What is the population of 18966?
About 36,370 people (±1,122), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 38,079.
What is the median household income in 18966?
$128,838 (±$8,260), 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 18966?
33 USPS carrier routes with 14,640 residential and 733 business mailboxes (15,373 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 18966?
The closest, measured center to center: 18954 (2.7 mi, Richboro), 19053 (3 mi, Trevose), 18974 (3.9 mi, Warminster Heights), 19009 (4.5 mi, Bryn Athyn borough, PA), 19006 (4.9 mi, Bryn Athyn borough, PA) and 19116 (4.9 mi, Philadelphia).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.