Residential delivery area · Kentucky
ZIP Code 42445: Princeton, KY
ZIP code 42445 uses the postal name Princeton, Kentucky and lies mostly in Caldwell County (91% of its land), reaching into Lyon County and Hopkins County (Census 2020 ZIP-county file). About 11,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $55,096 (Census Bureau, ACS 2020-2024). By Census place, 3% of its land lies in Princeton; 97% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Princeton · its only residential ZIP
- County
- Caldwell County (91%); Lyon County (5%); Hopkins County (4%)
- Census places
- Princeton
- House district
- KY-1 119th Congress
- State
- Kentucky
- Time zone
- Central
- Land area
- 261.4 sq mi · 40 people per sq mi
Where is ZIP code 42445?
42445 centers on 37.128°, -87.858° and covers 261.4 square miles of land plus 2.2 of water. It borders 7 ZIP codes: 42411, 42408, 42038, 42215, 42450, 42064, 42211.
The map draws ZIP code areas only. For the streets inside 42445, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 42445 compare with the rest of Caldwell County?
| Measure | 42445 | In Caldwell County | In KY |
|---|---|---|---|
| People (ACS 2020-2024) | 10,533 | 1st of 5 | 132nd of 780 |
| Median household income | $55k | 3rd of 4 | 211th of 310 |
| Median home value | $118k | 3rd of 4 | 257th of 320 |
Its median household income is higher than in 21% of U.S. residential ZIP codes, and it is denser than 38% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 42445?
The 2020 Census counted 11,009 people in 42445; the ACS, which samples households over 2020-2024, estimates 10,533. Between the 2010 and 2020 censuses its population fell 2.8% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 10,533
- 2020 Census count
- 11,009−2.8% since 2010 (11,331)
- Households
- 4,310
- Median age
- 44.0
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 42445?
Of the 10,533 people the ACS estimates in 42445, 21.8% are under 18 and 23.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (87.7%).
- Under 1821.8%
- 18 to 6455.0%
- 65 and older23.2%
- White, not Hispanic87.7%
- Black, not Hispanic7.1%
- Other or two or more3.4%
- Hispanic or Latino1.8%
- Asian, not Hispanic0.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 42445 earn?
Median household income is $55,096 (ACS 2020-2024), the 3rd highest of the 4 ranked ZIP codes in Caldwell County. It is not measurably different from 2015-2019 ($53,196 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $55,096±$10,367
- Income per person
- $31,322
- Below the poverty line
- 15.3%
- Unemployed (of the labor force)
- 5.1%
- Adults 25+ with a bachelor's degree
- 16.3%
- Adjusted gross income per tax return, 2022
- $55,6814,590 returns; wages 70% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 42445?
FHFA's house price index for 42445, built from repeat sales and appraisals of the same homes, rose 86% from 2015 to 2025 and rose 64% from 2020 to 2025, and moved −0.6% in 2025.
- Median home value (owners' estimate)
- $118,100
- Median gross rent
- $768
- Homes owned by their occupants
- 65.9%
- Housing units
- 4,912
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 42445?
244 business establishments had a location in this ZIP code in 2023, 21 fewer than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade51
- Other services (except public administration)32
- Health care and social assistance28
- Accommodation and food services24
- Construction20
- Finance and insurance19
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 42445?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 42411 | Fredonia | 2,002 | $61k | 9.7 mi |
| 42408 | Dawson Springs | 5,888 | $61k | 9.8 mi |
| 42038 | Eddyville | 6,282 | $65k | 10.9 mi |
| 42215 | Cerulean | 1,319 | $83k | 13.7 mi |
| 42450 | Providence | 3,859 | $55k | 18.6 mi |
| 42064 | Marion | 8,098 | $47k | 19.9 mi |
| 42211 | Cadiz | 13,475 | $60k | 21.5 mi |
| 42453 | Saint Charles | 452 | $54k | 14.9 mi (near) |
| 42055 | Kuttawa | 2,201 | $64k | 17.8 mi (near) |
| 42037 | Dycusburg | 16 | – | 18.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.