Union County is named for the union of states of the United States of America.
Surrounding County Courthouses:
N – Baker County
E – Bradford County
S – Alachua County
W – Columbia County
Created: May 20, 1921 
County Seat:
Lake Butler 1921 – present
County Courthouse – Lake Butler
Location: 55 West Main Street / NW 1st Avenue
Built: 1936 – 1937
Style: Classical Revival
Architect: John Pearson of Gainesville
Contractor: Works Progress Administration
Description: The building faces south and is a two story red colored brick, stone and concrete structure. The building is located on landscaped grounds in the center of Lake Butler. The south front has a projecting central section with large stone trimmed arch at the entrance with arched window on the second story. The corners are trimmed with stone. A cornice runs below the roof line. The building was a Works Progress Administration project. An additions were added in 1967. The architect was Harry E Burns Jr. and the contractor was Vinson T Forrester Jr. From 1999 to 2000, renovation was done. The architect was T C Skinner & Associates Inc. of Gainesville and the contractor was Scott Peterson Construction of Jacksonville.
Old County Courthouse – Lake Butler
Location: 285 NE First Avenue / NW 3rd Street
Built: 1922
Style: Wood Frame
Architect: Unknown
Contractor: Unknown
Description: The building faces north and is a two story wood frame structure. The building is located on landscaped grounds in the center of Lake Butler to the north of the courthouse. The north front has a one story veranda. On the west side is a stone chimney and central porch. The building foundation is stone and the roof is hipped. The building served as the courthouse from 1922 to 1936 and is now the Women’s Club. In 1936, the building was moved from the courthouse square to its present location.
History: In 1858, Lake Butler became the county seat for New River County and in 1861 for Bradford County but no courthouse was erected. In 1898, the county seat was moved to Starke and a courthouse s constructed in 1902 to 1903 and Lake Butler became the county seat of Union County in 1921. In 1921, office space was rented in the Townsend Building. In 1922, the first courthouse was constructed in Lake Butler and is still standing. The second and present courthouse was constructed in 1936 to 1937 at a cost of $39,000.
County Courthouse – Lake Butler
Old County Courthouse – Lake Butler
Photos taken 2009 and 2018