Johnson County is named for E P Johnson, who was an attorney in Cheyenne.
Surrounding County Courthouses:
N – Sheridan County
E – Campbell County
S – Converse County and Natrona County
W – Washakie County and Big Horn County
Created: December 8, 1875 
County Seat:
Buffalo 1881 – present
County Courthouse – Buffalo
Location: 76 North Main Street / Fort Street
Built: 1884
Style: Italianate
Architect: Edward Curran and James Curran
Contractor: Edward Curran and James Curran
Description: The building faces east and is a three story red colored brick structure. The building is located on landscaped grounds atop a low hill in the center of Buffalo. The east front has a recessed center section with an arched entrance on the first story. A wide white colored horizontal belt runs below the roof line, and there is a peaked roof at the east front. The roof is hipped. In the interior, the wooden paneling in the main hallway is distinctive. There are long twin stairways with curving wood stairs with their ornamental stringers, one on each side at the west end of the main hall. The former courtroom on the east side of the second story is now the Commissioner’s Room. An addition was added on the west side.
Note: Bricks for the courthouse were made from clay soil obtained from a location which is now just south of the Buffalo City Park. Kilns at the foot of the Big Horn Mountains provided the lime for the mortar, mixed from one measure of lime and two measures of sand. The courthouse is the oldest courthouse in Wyoming retaining its original character. The oldest courthouse is located in Uinta County.
See: National Register of Historic Places – Johnson County Courthouse
County Justice Center – Buffalo
Location: 620 West Fetterman Street / South Cedar Street
Built: 2010 – 2011
Style: Modern
Architect: GSG Architecture of Casper
Contractor: Groathouse Construction Inc. of Laramie
Description: The building faces west and is a two story buff and red colored brick, concrete and glass structure. The building is located on landscaped grounds in the center of Buffalo to the west of the courthouse. The building has a series of peaked roofs. On the south side is a large porch supported by five large wood columns. The one story west entrance projects from the main building. Along the north side of the building are columns of small stones. The building houses the County District Court and County Circuit Court of the 4th Judicial District.
See: The 4th Judicial District includes Sheridan County.
History: The county was created in 1875 and Buffalo was selected as the county seat. The first courthouse was a converted dance hall. The second and present courthouse was constructed in 1884 at a cost of $81,650. The County Justice Center was constructed in 2010 to 2011.
County Courthouse – Buffalo
Commissioner’s Meeting Room ( former courtroom )
County Justice Center – Buffalo
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Photos taken 2009, 2013 and 2023