| ZIP Codes: | 83 ZIP Codes (54 Standard, 24 PO Box, 5 Unique) [See All] |
| Area Codes: | 215 / 267 / 445 / 484 / 610 / 835 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:32 PM |
| Population: | 863,513 [See All] |
| FIPS: | 42091 |
| CBSA: | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD |
| Land Area: | 488 sq mi |
| Water Area: | 4 sq mi |
| Coordinates: | 40.1925, -75.3326 |
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863,513 residents live across 83 ZIPs covering 488 sq mi, served by 76 distinct USPS-recognized cities.
Population moved from 806,502 to 863,006 from 2014 to 2024 — a +7.0% change. 44 ZIPs gained residents, 15 lost.
The county's wealthiest ZIP 19066 (Merion Station, $250,001 median) and poorest ZIP 19401 (Norristown, $69,908) are 9.8 miles apart — a 3.6× income gap across local geography.
Median home values vary 6.3× across this county — from $234,000 in 19401 (Norristown) to $1,477,200 in 19035 (Gladwyne).
Density varies 238× across the county — from 278 people/sq mi in 18054 (Green Lane) to 66,118 in 19009 (Bryn Athyn).
Educational attainment ranges from 24.7% bachelor's+ in 18076 (Red Hill) to 88.0% in 19035 (Gladwyne) — the breadth of educational profiles across the area.
Within Pennsylvania, this is the #3 most populous of 67 counties and ranks #3 for median household income with the #7 fastest decade growth .
On the national stage, Montgomery County is the #69 most populous US county , ranks #56 for income .
Hosts 4 single-entity Unique ZIPs: 19455Harriet Carter Gifts ; 19429Bell Telephone Co ; 19441Harleysville Insurance Co ; and 19415Shared Return Zip .
Weighted by population, the typical household earns about $119,594 across the county — reflecting what a typical resident sees, not a simple ZIP average.
52.7% of adults age 25+ hold a bachelor's degree or higher (322,058 of 611,188 reporting).
54 Standard delivery, 24 PO Box only, 5 single-entity Unique ZIPs serve this county.
18 ZIPs in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
5 ZIP codes in this county serve a single facility — typically theme parks, universities, large corporations, airports, or government complexes.
Median household income spans 3.6× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 19446 | Lansdale | Standard | 61,848 | $106,310 | 23.4 | 12.6% |
| 19464 | Pottstown | Standard | 49,101 | $79,787 | 26.1 | 7.2% |
| 19403 | Norristown | Standard | 44,017 | $104,071 | 24.2 | -2.8% |
| 19426 | Collegeville | Standard | 43,460 | $151,748 | 34.3 | 8.4% |
| 19401 | Norristown | Standard | 43,359 | $69,908 | 6.2 | 3.2% |
| 19038 | Glenside | Standard | 32,296 | $117,683 | 8.1 | 4.3% |
| 19002 | Ambler | Standard | 32,128 | $143,600 | 21.3 | -3.2% |
| 19406 | King Of Prussia | Standard | 30,362 | $116,847 | 13.7 | 30.1% |
| 19468 | Royersford | Standard | 28,194 | $108,534 | 17.4 | 9.7% |
| 19454 | North Wales | Standard | 27,755 | $118,177 | 12.6 | -4.9% |
| 19438 | Harleysville | Standard | 25,438 | $138,134 | 22.0 | 3.1% |
| 19006 | Huntingdon Valley | Standard | 23,443 | $128,295 | 14.5 | 9.2% |
| 19040 | Hatboro | Standard | 22,078 | $114,293 | 5.5 | 9.6% |
| 19027 | Elkins Park | Standard | 20,420 | $106,066 | 3.8 | 4.7% |
| 19422 | Blue Bell | Standard | 20,412 | $158,288 | 12.4 | 9.1% |
| 19428 | Conshohocken | Standard | 20,411 | $122,835 | 6.9 | 25.7% |
| 19090 | Willow Grove | Standard | 19,662 | $99,928 | 4.6 | 1.7% |
| 19046 | Jenkintown | Standard | 19,640 | $109,818 | 7.0 | 14.3% |
| 19440 | Hatfield | Standard | 19,431 | $99,408 | 11.1 | 5.8% |
| 19001 | Abington | Standard | 17,867 | $108,042 | 3.2 | 2.9% |
| 19525 | Gilbertsville | Standard | 17,725 | $140,403 | 18.0 | 16.9% |
| 19044 | Horsham | Standard | 17,279 | $88,173 | 9.3 | 6.8% |
| 19473 | Schwenksville | Standard | 17,259 | $138,819 | 26.1 | 5.6% |
| 19462 | Plymouth Meeting | Standard | 16,331 | $137,535 | 8.6 | 9.4% |
| 19096 | Wynnewood | Standard | 15,249 | $186,277 | 3.5 | 8.9% |
| 18969 | Telford | Standard | 15,245 | $108,995 | 16.8 | 0.7% |
| 18964 | Souderton | Standard | 14,546 | $96,143 | 9.6 | 5.3% |
| 19003 | Ardmore | Standard | 14,255 | $119,861 | 2.0 | 11.1% |
| 18073 | Pennsburg | Standard | 11,755 | $115,766 | 19.1 | 23.9% |
| 19004 | Bala Cynwyd | Standard | 11,230 | $149,232 | 2.8 | 17.6% |
| 19444 | Lafayette Hill | Standard | 11,065 | $147,418 | 5.0 | 2.5% |
| 19072 | Narberth | Standard | 10,129 | $172,550 | 3.0 | 11.2% |
| 19095 | Wyncote | Standard | 8,030 | $97,727 | 2.1 | 2.3% |
| 19034 | Fort Washington | Standard | 7,488 | $165,354 | 7.0 | 26.7% |
| 19025 | Dresher | Standard | 7,423 | $188,490 | 3.2 | 38.0% |
| 19075 | Oreland | Standard | 7,384 | $120,813 | 1.9 | -2.1% |
| 19012 | Cheltenham | Standard | 6,910 | $125,625 | 1.8 | 0.2% |
| 19041 | Haverford | Standard | 6,308 | $151,989 | 3.3 | 4.1% |
| 19066 | Merion Station | Standard | 5,839 | $250,001 | 1.4 | -4.9% |
| 18041 | East Greenville | Standard | 5,768 | $98,615 | 13.2 | 8.0% |
| 18074 | Perkiomenville | Standard | 5,590 | $130,462 | 16.6 | -4.9% |
| 19405 | Bridgeport | Standard | 5,145 | $83,859 | 0.9 | -5.5% |
| 18054 | Green Lane | Standard | 4,932 | $101,920 | 17.7 | 12.4% |
| 19031 | Flourtown | Standard | 4,929 | $134,592 | 3.0 | 2.9% |
| 19035 | Gladwyne | Standard | 3,937 | $250,001 | 5.0 | 3.6% |
| 18076 | Red Hill | Standard | 2,833 | $79,615 | 1.0 | -5.8% |
| 18915 | Colmar | Standard | 1,648 | $141,696 | 1.2 | 123.3% |
| 19453 | Mont Clare | Standard | 1,259 | $80,583 | 0.9 | -1.3% |
| 19009 | Bryn Athyn | PO Box | 1,124 | $137,188 | 0.0 | 9.6% |
| 19492 | Zieglerville | Standard | 811 | $58,233 | 0.7 | 47.7% |
| 19437 | Gwynedd Valley | PO Box | 531 | $215,817 | 0.0 | -3.8% |
| 19490 | Worcester | PO Box | 507 | — | 0.0 | — |
| 19436 | Gwynedd | Standard | 435 | $77,159 | 0.2 | -27.4% |
| 18936 | Montgomeryville | Standard | 296 | $250,001 | 0.9 | 458.5% |
| 19456 | Oaks | PO Box | 286 | $205,500 | 0.2 | -64.7% |
| 18070 | Palm | Standard | 223 | $74,638 | 3.0 | -76.8% |
| 19474 | Skippack | PO Box | 222 | — | 0.0 | -52.3% |
| 19477 | Spring House | Standard | 136 | — | 0.1 | 32.0% |
| 19435 | Frederick | Standard | 75 | $111,667 | 1.2 | -25.0% |
| 19472 | Sassamansville | PO Box | 54 | $113,056 | 0.0 | 50.0% |
| 19450 | Lederach | PO Box | — | — | 0.0 | — |
| 19478 | Spring Mount | PO Box | — | — | 0.0 | — |
| 19455 | North Wales | Unique | — | — | 0.0 | — |
| 19486 | West Point | PO Box | — | — | 0.0 | — |
| 18971 | Tylersport | PO Box | — | — | 0.0 | — |
| 19484 | Valley Forge | PO Box | — | — | 0.0 | — |
| 18957 | Salford | PO Box | — | — | 0.0 | — |
| 19409 | Fairview Village | PO Box | — | — | 0.0 | — |
| 19404 | Norristown | PO Box | — | — | 0.0 | — |
| 18084 | Sumneytown | PO Box | — | — | 0.0 | — |
| 19429 | Conshohocken | Unique | — | — | 0.0 | — |
| 19430 | Creamery | PO Box | — | — | 0.0 | — |
| 18958 | Salfordville | PO Box | — | — | 0.0 | — |
| 19408 | Eagleville | PO Box | — | — | 0.0 | — |
| 19407 | Audubon | PO Box | — | — | 0.0 | — |
| 19423 | Cedars | PO Box | — | — | 0.0 | — |
| 18918 | Earlington | PO Box | — | — | 0.0 | — |
| 18979 | Woxall | PO Box | — | — | 0.0 | — |
| 19443 | Kulpsville | PO Box | — | — | 0.0 | — |
| 19451 | Mainland | PO Box | — | — | 0.0 | — |
| 19441 | Harleysville | Unique | — | — | 0.0 | — |
| 19415 | Eagleville | Unique | — | — | 0.0 | — |
| 19424 | Blue Bell | Unique | — | — | 0.0 | — |