Allison is a township in Clinton County, Pennsylvania, home to about 271 people across 1.5 square miles. It has no ZIP code of its own: it’s part of 17745 and 17751.
Homes sold for a median of $131 per square foot across 2 ZIP codes in the three months ending August 2026, and all of them were seller’s markets.
Mostly Lock Haven; part is in Allison
Mostly Lamar; part is in Allison
Each card is that ZIP code’s whole market, including any part outside Allison. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Allison’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Baltimore/Washington International Thurgood Marshall Airport (BWI)139 miles away |
|---|---|
| Closer regional airport | State College Regional Airport (SCE)26 miles away |
| Nearest city of 250,000+ | Baltimore, MD132 miles away |
| Nearest city of 1 million+ | Philadelphia, PA144 miles away |
Straight-line distances from the center of Allison; 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.
Allison had 229 residents in the 2020 census, up 16% since 2000.
It’s the 2385th largest of 2,568 towns in Pennsylvania by population.
Clinton County grew from 29,197 residents in 1900 to 37,450 in 2020.
Clinton 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 18°F. About 41.9 inches of rain and melted snow fall in a typical year, with about 30 inches of snow.
Source: NOAA 1991–2020 climate normals, Lock Haven Sewage Plt, PA weather station (3 miles away).
10,683 jobs at 801 businesses in Clinton County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
184 doctors and other health care providers list an office in Allison’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 30 |
|---|---|
| Specialist doctors | 13 |
| Dentists | 13 |
| Nurse practitioners and physician assistants | 43 |
| Mental health providers | 48 |
| Physical and occupational therapists | 16 |
| Optometrists | 6 |
| Chiropractors | 15 |
| Pharmacies | 6 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Grocery stores
Pharmacies
Libraries
Museums
Theaters and performance venues
Counts are within about 1 mile 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.
Public schools here are run by Keystone Central SD, Keystone Central Career and Technology Center. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Mill Hall El SchMill Hall | K–4 | 318 | Public | 1.1 mi |
| Robb El SchLock Haven | K–4 | 375 | Public | 3.2 mi |
| Woodward El SchLock Haven | K–4 | 215 | Public | 3.8 mi |
| Central Mountain MSMill Hall | 5–8 | 879 | Public | 1.2 mi |
| Central Mountain HSMill Hall | 9–12 | 1,013 | Public | 2.0 mi |
| Keystone Central Career and Technology CenterMill Hall | 9–12 | — | Career and Technical | 2.0 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Lock Haven Catholic SchoolLock Haven | K–8 | 167 | Roman Catholic | 3.2 mi |
| West Branch Christian AcademyMill Hall | K–12 | 26 | Mennonite | 2.2 mi |
| C/O Allen KingMill Hall | 1–8 | 21 | Amish | 4.4 mi |
| C/O Levi KingMill Hall | 1–8 | 16 | Amish | 2.3 mi |
| C/O Mahlon LappMill Hall | 1–8 | 23 | Amish | 2.7 mi |
| Sandy Ridge SchoolMill Hall | 1–8 | 22 | Amish | 6.7 mi |
| C/O Gideon KauffmanMill Hall | 2–8 | 17 | Amish | 3.9 mi |
| Fishing Creek Parochial SchoolMill Hall | 2–8 | 17 | Amish | 4.9 mi |
| Bald Eagle Wilderness Boys Camp SchoolMill Hall | 3–11 | 38 | Christian (no specific denomination) | 6.0 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Lock Haven, Woodward Township (Clinton County), Lamar, Bald Eagle, Porter Township (Clinton County), Mill Hall, Flemington, Castanea, Wayne Township (Clinton County), Dunnstable, Pine Creek Township (Clinton County), Gallagher, Colebrook, Chapman Township (Clinton County), McHenry, Brown Township and Grugan.
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.