Union is a city in Boone County, Kentucky, home to about 7,642 people across 3.5 square miles. Its ZIP code is 41091.
Homes sold for a median of $193 per square foot in the three months ending August 2026, a seller’s market.
Mostly Union; also Florence and Rabbit Hash
Each card is that ZIP code’s whole market, including any part outside Union. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Union’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Cincinnati Northern Kentucky International Airport (CVG)8 miles away |
|---|---|
| Nearest city of 250,000+ | Cincinnati, OH18 miles away |
| Nearest city of 1 million+ | Chicago, IL253 miles away |
Straight-line distances from the center of Union; 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.
Union had 7,416 residents in the 2020 census, up 156% since 2000.
It’s the 60th largest of 553 towns in Kentucky by population.
Boone County grew from 11,170 residents in 1900 to 135,968 in 2020.
Boone County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 86°F in summer, and winter lows average 23°F. About 45.3 inches of rain and melted snow fall in a typical year, with about 23 inches of snow.
Source: NOAA 1991–2020 climate normals, Cincinnati Northern Ky Ap, KY weather station (7 miles away).
88,138 jobs at 3,163 businesses in Boone County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
66 doctors and other health care providers list an office in Union.
Nearest hospitals
Providers with an office here
| Primary care doctors | 10 |
|---|---|
| Specialist doctors | 2 |
| Dentists | 10 |
| Nurse practitioners and physician assistants | 16 |
| Mental health providers | 8 |
| Physical and occupational therapists | 16 |
| Optometrists | 2 |
| Chiropractors | 2 |
| Pharmacies | 1 |
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 (1 nearby)
Grocery stores
Pharmacies
Libraries
Counts are within about 1.5 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.
Established in 1838.
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Boone County. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Longbranch Elementary SchoolUnion | Pre-K–5 | 957 | Public | 2.3 mi |
| New Haven Elementary SchoolUnion | Pre-K–5 | 716 | Public | 3.1 mi |
| Shirley Mann Elementary SchoolUnion | Pre-K–5 | 710 | Public | 2.5 mi |
| Ballyshannon Middle SchoolUnion | 6–8 | 609 | Public | 1.6 mi |
| Gray Middle SchoolUnion | 6–8 | 1,006 | Public | 2.7 mi |
| Larry A. Ryle High SchoolUnion | 9–12 | 2,077 | Public | 2.8 mi |
| Randall K. Cooper High SchoolUnion | 9–12 | 1,490 | Public | 2.2 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| St Timothy SchoolUnion | Pre-K–8 | 540 | Roman Catholic | 2.9 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 Florence and Rabbit Hash.
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.