Zip Code 15143
Sewickley, Pennsylvania — Allegheny County
📍 ZIP code 15143 is in Sewickley, Allegheny County, Pennsylvania.
ZIP code 15143 is located in Sewickley, Allegheny County, Pennsylvania. It is a zip code in the Eastern (EST/EDT) Time Zone with an estimated population of 21,949. The area code for ZIP code 15143 is 412.
Quick Answer
Zip code 15143 is in Sewickley, Pennsylvania (Allegheny County). It has a population of 21,949, median household income of $125,339, and median home value of $434,900.
Population
21,949
Income
$125,339
Home Value
$434,900
Climate
84°F / 21°F
About Zip Code 15143
Zip code 15143 is located in Sewickley, Pennsylvania, within Allegheny County. Home to approximately 21,949 residents, this area sits at an elevation of 1042 ft and falls within the Eastern (EST/EDT) timezone. The local area code is 412.
The median household income is $125,339 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $434,900, and the cost of living index is 153 (53% above the national average of 100).
Summers average a high of 84°F while winters drop to 21°F. The area receives about 39 in of rain and 20 in of snow annually. The zip code covers 36.8 square miles of land area and 0.7 square miles of water.
Key Statistics
21,949
$125,339
$434,900
Eastern (EST/EDT)
412
1042 ft
36.8 sq mi
46.3
9,411
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Compare With Nearby Zip Codes
| Metric | 15143 | 15056 | 15046 | 15003 | 15225 | 15081 |
|---|---|---|---|---|---|---|
| City | Sewickley, PA | Ambridge, PA | Aliquippa, PA | Ambridge, PA | Pittsburgh, PA | South Heights, PA |
| Population | 21,949 | 1,034 | 2,310 | 11,394 | 1,031 | 343 |
| Median Income | $125,339 | $66,176 | $79,514 | $57,943 | $59,620 | $62,500 |
| Home Value | $434,900 | $135,000 | $181,900 | $119,000 | $165,800 | $125,000 |
| Cost of Living | 153 | 61 | 76 | 60 | 60 | 62 |
| Median Age | 46.3 | 44.5 | 53.1 | 44.5 | 44.8 | 49.3 |
Cost of Living
100 = National Average. Sewickley's cost of living is 53% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
3.5x
Demographics
Zip code 15143 has a population of 21,949 people with a median age of 46.3. There are 9,411 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Sewickley (15143) population trend from 2010 to 2024
↓ -36.7%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
84°F
21°F
39 in
20 in
Sewickley experiences warm summers with average highs around 84°F. Winters are cool with lows averaging 21°F. The area receives about 20 in of snow per year.
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Housing & Economy
Median Home Value
$434,900
Median Household Income
$125,339
With 9,411 housing units across 36.8 square miles, 15143 has a housing density of 256 units per square mile. The home price-to-income ratio is 3.5x.
Location & Geography
Latitude
40.5681°
Longitude
-80.1468°
Land Area
36.8 sq mi
Water Area
0.7 sq mi
Nearby Zip Codes
Zip codes closest to 15143 (Sewickley, PA) with distances:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 15143's $125,339. A way to compare Sewickley to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 15143 (Sewickley, PA). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Sewickley, Pennsylvania?
Sewickley, Pennsylvania uses zip code 15143.
What county is zip code 15143 in?
Zip code 15143 is located in Allegheny County, Pennsylvania.
What is the population of zip code 15143?
The population of zip code 15143 is 21,949 with a median age of 46.3.
Is 15143 in Sewickley, Pennsylvania?
Yes, zip code 15143 is in Sewickley, Allegheny County, Pennsylvania. The area code is 412.
Frequently Asked Questions
What city is zip code 15143 in?
Zip code 15143 is in Sewickley, Pennsylvania. It is part of Allegheny County and uses the Eastern (EST/EDT) timezone.
What is zip code 15143?
Zip code 15143 is a U.S. postal code in Sewickley, Pennsylvania (Allegheny County). It has a population of 21,949 and covers 36.8 square miles.
What is the population of zip code 15143?
The population of zip code 15143 (Sewickley, PA) is 21,949 with a median age of 46.3. There are approximately 9,411 housing units in this area.
What is the median income in zip code 15143?
The median household income in zip code 15143 (Sewickley, PA) is $125,339 per year. The cost of living index is 153 (100 = national average).
What is the average home price in zip code 15143?
The median home value in zip code 15143 (Sewickley, PA) is $434,900. The cost of living index is 153 compared to the national average of 100.
What county is zip code 15143 in?
Zip code 15143 is located in Allegheny County, Pennsylvania. The primary city is Sewickley.
What is the area code for zip code 15143?
Zip code 15143 in Sewickley, PA uses area code 412. It is located in the Eastern (EST/EDT) timezone.
Is zip code 15143 a good place to live?
Zip code 15143 (Sewickley, PA) has a cost of living index of 153 (100 = national average), a median household income of $125,339, and median home values of $434,900. The median age is 46.3. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 15143?
The cost of living index for zip code 15143 (Sewickley, PA) is 153, where 100 represents the national average. This area is above the national average. Median home value: $434,900.
What schools serve zip code 15143?
Zip code 15143 in Sewickley, Pennsylvania is served by the local school district of Allegheny County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.