Lack is a township in Juniata County, Pennsylvania, home to about 629 people across 57 square miles. Its ZIP code is 17021, and parts of 17243 are in Lack too.
Homes sold for a median of $255 per square foot in the three months ending August 2026, a seller’s market.
Mostly Lack; also Fannett and Toboyne
Mostly Orbisonia; part is in Lack
Each card is that ZIP code’s whole market, including any part outside Lack. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | Washington Dulles International Airport (IAD)96 miles away |
|---|---|
| Closer regional airport | Altoona Blair County Airport (AOO)31 miles away |
| Nearest city of 250,000+ | Baltimore, MD92 miles away |
| Nearest city of 1 million+ | Philadelphia, PA139 miles away |
Straight-line distances from the center of Lack; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Lack had 636 residents in the 2020 census, down 15% since 2000.
It’s the 2056th largest of 2,568 towns in Pennsylvania by population.
Juniata County grew from 16,054 residents in 1900 to 23,509 in 2020.
Juniata County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 85°F in summer, and winter lows average 21°F. About 40.7 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Raystown Lake 2, PA weather station (19 miles away).
5,904 jobs at 516 businesses in Juniata County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
Nearest hospitals
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances.
Parks (1 nearby)
Grocery stores
Pharmacies
Counts are within about 5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
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Shares ZIP codes with Cromwell, Orbisonia, Shirley, Springfield Township (Huntingdon County), Fannett, Rockhill, Toboyne and Tuscarora Township (Juniata County).
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.