Residential delivery area · Kentucky
ZIP Code 40440: Junction City, KY
ZIP code 40440 uses the postal name Junction City, Kentucky and lies entirely in Boyle County (Census 2020 ZIP-county file). About 2,400 people live there (Census Bureau, ACS 2020-2024). Median household income is $54,500 (Census Bureau, ACS 2020-2024). By Census place, 10% of its land lies in Junction City; 90% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Junction City · its only residential ZIP
- County
- Boyle County
- Census places
- Junction City
- Micro area
- Danville, KY
- House district
- KY-1 119th Congress
- State
- Kentucky
- Time zone
- Eastern
- Land area
- 13.2 sq mi · 184 people per sq mi
Where is ZIP code 40440?
40440 centers on 37.579°, -84.840° and covers 13.2 square miles of land plus 0.1 of water. It borders 3 ZIP codes: 40464, 40422, 40484.
The map draws ZIP code areas only. For the streets inside 40440, 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 40440 compare with the rest of Boyle County?
| Measure | 40440 | In Boyle County | In KY |
|---|---|---|---|
| People (ACS 2020-2024) | 2,428 | 2nd of 5 | 294th of 780 |
| Median household income | $55k | not ranked | not ranked |
| Median home value | $135k | 2nd of 2 | 227th of 320 |
40440's median household income is not ranked: its 90% margin of error (±$21,561) is more than a quarter of the figure ($54,500). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 62% of 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 40440?
The 2020 Census counted 2,237 people in 40440; the ACS, which samples households over 2020-2024, estimates 2,428. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 2,428±320 (90% margin)
- 2020 Census count
- 2,237
- Households
- 950
- Median age
- 37.9
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 40440?
Of the 2,428 people the ACS estimates in 40440, 26.5% are under 18 and 14.9% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (82.7%).
- Under 1826.5%
- 18 to 6458.6%
- 65 and older14.9%
- White, not Hispanic82.7%
- Other or two or more7.0%
- Hispanic or Latino5.5%
- Asian, not Hispanic4.4%
- Black, not Hispanic0.3%
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 40440 earn?
Median household income is $54,500 (ACS 2020-2024).
- Median household income
- $54,500±$21,561
- Income per person
- $24,611
- Below the poverty line
- 29.9%
- Unemployed (of the labor force)
- 6.8%
- Adults 25+ with a bachelor's degree
- 19.5%
- Adjusted gross income per tax return, 2022
- $49,888980 returns; wages 76% 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 40440?
FHFA's house price index for 40440, built from repeat sales and appraisals of the same homes, rose 87% from 2015 to 2025 and rose 64% from 2020 to 2025, and moved +5.6% in 2025.
- Median home value (owners' estimate)
- $134,700
- Median gross rent
- $983
- Homes owned by their occupants
- 88.0%
- Housing units
- 1,065
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 40440?
24 business establishments had a location in this ZIP code in 2023, 2 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction6
- Retail trade5
- Other services (except public administration)4
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 40440?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 40464 | Parksville | 936 | $67k | 4.7 mi |
| 40422 | Danville | 25,950 | $60k | 4.9 mi |
| 40484 | Stanford | 12,331 | $53k | 10.0 mi |
| 40437 | Hustonville | 4,488 | $54k | 8.4 mi (near) |
| 40468 | Perryville | 2,084 | $64k | 9.2 mi (near) |
| 40328 | Gravel Switch | 963 | $45k | 9.4 mi (near) |
| 40448 | McKinney | 0 | – | 9.6 mi (near) |
| 40310 | Burgin | 471 | $57k | 12.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.