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Union, Kentucky
Union, KY welcome sign.jpg
Flag of Union, Kentucky
Proud Past, Promising Future!
Location of Union in Boone County, Kentucky.
Location of Union in Boone County, Kentucky.
Union, Kentucky is located in Kentucky
Union, Kentucky
Union, Kentucky
Location in Kentucky
Country United States
State Kentucky
County Boone
 • Type Commission
 • Total 3.47 sq mi (8.99 km2)
 • Land 3.47 sq mi (8.99 km2)
 • Water 0.00 sq mi (0.00 km2)
837 ft (255 m)
 • Total 7,416
 • Density 2,135.33/sq mi (824.50/km2)
Time zone UTC-5 (Eastern (EST))
 • Summer (DST) UTC-4 (EDT)
ZIP code
Area code(s) 859
FIPS code 21-78384
GNIS feature ID 0505762
Interstates I-71 (KY).svgI-75 (KY 1957).svg
U.S. Routes US 42 (1961).svgUS 127 (1961).svg
State Routes Elongated circle 237.svgElongated circle 536.svgElongated circle 2953.svg

Union is a home rule-class city in Boone County, Kentucky, United States. The population was 7,416 as of the 2020 United States Census. The area was rural until residential growth in the 1990s and 2000s. Union is located 17 miles (27 km) southwest of Cincinnati, Ohio.


The City of Union grew from a small settlement that may have existed as early as the late 18th century. However, by the early 19th century, much of the land that now lies in Union was owned by the Fowler family, and Benjamin Piatt Fowler built his home in what is now the northern area of the city c. 1817.

It has been recorded that Union was established as early as 1833, but existing documentation shows that Union was officially incorporated as a city in 1838. Why the name Union was chosen no one actually knows, but the story goes that since it was a connection point between Florence and Big Bone Lick, "Union" seemed somehow appropriate. Salt was manufactured at Big Bone Lick during the early 19th century, and then brought to Union for distribution to other area settlements.


Union is located at 38°56′43″N 84°40′19″W / 38.94528°N 84.67194°W / 38.94528; -84.67194 (38.945185, -84.671866).

According to the United States Census Bureau, the city has a total area of 3.2 square miles (8.3 km2), all of it land.


As of the census of 2010, there were 5,379 people, 1,661 households, and 1,471 families residing in the city. The population density was 894.4 people per square mile (345.8/km2). There were 1,739 housing units at an average density of 271.7 per square mile (105.1/km2). The racial makeup of the city was 91.3% White, 1.2% African American, 0.0% Native American, 5.7% Asian, 0.0% Pacific Islander, 0.0% from other races, and 1.7% from two or more races. Hispanic or Latino of any race were 1.8% of the population.

There were 850 households, out of which 62.9% included children under the age of 18. 85.3% were married couples living together, 5.1% had a female householder with no husband present, and 7.8% were non-families. 5.9% of all households were made up of individuals, and 1.8% had someone living alone who was 65 years of age or older. The average household size was 3.40 and the average family size was 3.55.

Historical population
Census Pop.
1920 100
1930 94 −6.0%
1970 233
1980 601 157.9%
1990 1,001 66.6%
2000 2,893 189.0%
2010 5,379 85.9%
2020 7,416 37.9%
U.S. Decennial Census

In the city, the population age ranges included 37.6% under the age of 18, 4.8% from 18 to 24, 35.9% from 25 to 44, 19.4% from 45 to 64, and 2.3% who were 65 years of age or older. The median age was 32 years. For every 100 females, there were 100.3 males. For every 100 females age 18 and over, there were 100.9 males.

The median income for a household in the city was $85,454, and the median income for a family was $85,859 (2009 estimates indicate a rise to $97,083 and $98,672, respectively). Males had a median income of $61,531 versus $34,861 for females. The per capita income for the city was $27,626. About 1.4% of families and 1.4% of the population were below the poverty line, including 1.1% of those under age 18 and 3.0% of those age 65 or over.


  • Arbor Springs
  • Cedarwood
  • Cool Springs
  • Dublin Green
  • Hampshire
  • Harmony
  • Hempsteade
  • Indian Hill
  • Ivy Pond
  • Lassing Green
  • Orleans
  • Plantation Pointe
  • Russwill
  • Sycamore
  • Teutonia Estates (Bias Hollow Road)
  • Triple Crown Country Club Community
  • Whispering Trail
  • Village of Brigadoon
  • Devonshire
  • Summerset Farms
  • Union Station


Boone County Public Library - Scheben Branch
Boone County Public Library - Scheben Branch

Schools and libraries

The City of Union is home to six public schools, all part of Boone County Schools:

Elementary School:

  • Longbranch Elementary
  • New Haven Elementary
  • Shirley Mann Elementary

Middle School:

  • Ballyshannon Middle School
  • Gray Middle School

High School:

  • Cooper High School
  • Larry A. Ryle High School

Union has a public library, Scheben Branch, which is an installation of the Boone County Public Library system.


Sign for US42 US127
US 42/US 127 at the KY 536 Junction

Roadways and freeways

The city of Union is served by two US Highways (US 42 and US 127) and three Kentucky Routes (237, 536, and 2953). Concurrent Interstates 71/75 connect the city directly to Cincinnati (northbound) and Lexington/Louisville (southbound).


Air travel is provided by the Cincinnati/Northern Kentucky International Airport. It is less than 20 miles away via Interstates 71/75 and Interstate 275.

Notable people

  • Steve Flesch (golfer)
  • Josh Hutcherson (actor)
  • Paul Marcotte (businessman and politician)
  • Tanner Morgan (football player)

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