Princeton is a city in Caldwell County, Kentucky, home to about 6,241 people across 9.0 square miles. Its ZIP code is 42445.
Homes sold for a median of $132 per square foot in the three months ending August 2026, a buyer’s market.
Each card is that ZIP code’s whole market, including any part outside Princeton. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Princeton’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Nashville International Airport (BNA)95 miles away |
|---|---|
| Closer regional airport | Barkley Regional Airport (PAH)50 miles away |
| Nearest city of 250,000+ | Nashville-Davidson, TN88 miles away |
| Nearest city of 1 million+ | Chicago, IL326 miles away |
Straight-line distances from the center of Princeton; 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.
Princeton had 6,270 residents in the 2020 census, down 4% since 2000.
It’s the 77th largest of 553 towns in Kentucky by population.
Caldwell County grew from 14,510 residents in 1900 to 12,649 in 2020.
Caldwell County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 89°F in summer, and winter lows average 27°F. About 51.1 inches of rain and melted snow fall in a typical year, with about 9 inches of snow.
Source: NOAA 1991–2020 climate normals, Princeton 1 Se, KY weather station (about a mile away).
3,557 jobs at 266 businesses in Caldwell County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
54 doctors and other health care providers list an office in Princeton.
Nearest hospitals
Providers with an office here
| Primary care doctors | 3 |
|---|---|
| Specialist doctors | 7 |
| Dentists | 4 |
| Nurse practitioners and physician assistants | 16 |
| Mental health providers | 15 |
| Physical and occupational therapists | 5 |
| Optometrists | 2 |
| Chiropractors | 2 |
| 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.
Parks (11 nearby)
Grocery stores (2 nearby)
Pharmacies (1 nearby)
Libraries (2 nearby)
Museums (1 nearby)
Theaters and performance venues
Counts are within about 2 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.
Established in 1820.
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Caldwell County, Kentucky Tech System. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Caldwell County Primary SchoolPrinceton | Pre-K–2 | 532 | Public | 2.2 mi |
| Caldwell County Elementary SchoolPrinceton | 3–5 | 386 | Public | 2.2 mi |
| Caldwell County Middle SchoolPrinceton | 6–8 | 400 | Public | 2.3 mi |
| Caldwell County Area Technology CenterPrinceton | 8–12 | — | Career and Technical | 2.3 mi |
| Caldwell County High SchoolPrinceton | 9–12 | 561 | Public | 2.3 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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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.