Clark County is named for William Clark, who was the leader of the Lewis and Clark expedition and later, Governor of the Missouri Territory.
Surrounding County Courthouses:
N – Van Buren County, Iowa and Lee County, Iowa
E – Lee County, Iowa and Hancock County, Illinois
S – Lewis County
W – Knox County and Scotland County
Created: December 16, 1836 
County Seat:
Waterloo 1837 – 1847
Alexandria 1847 – 1854
Waterloo 1854 – 1865
Kahoka 1865 – present
Former County Courthouse – Kahoka ( demolished )
Location: 111 East Court Street / North Johnson Street
Built: 1871 – 1872
Style: Colonial
Architect: W B Larkworthy of Quincy, Illinois
Contractor: J G Orr and P H Conner of Quincy, Illinois
Description: The building faces west and is a two story gray colored brick structure. The building is located on landscaped grounds in the center of Kahoka. The building is 45 feet by 72 feet with arched windows. On the center of the roof is a white colored octagonal cupola with round ironwork at the top. The south end of the building has a small wrought iron balcony over the entrance. In 1934, the exterior of the building was faced with stucco. The courtroom was located at the center of the second story. The building was remodeled in 1976 and finally razed in 2012.
See: National Register of Historic Places – Old Clark County Courthouse
County Courthouse – Kahoka
Location: 111 East Court Street / North Johnson Street
Built: 2012 – 2013
Style: Modern Colonial
Architect: Connell Architects of Columbia
Contractor: Whisto Construction Company of Canton
Description: The building faces south and is a two story red colored brick and concrete structure. The building is located on landscaped grounds in the center of Kahoka. The south front of the rectangular shaped building has a central entrance on the first story with two concrete columns with small portico. The windows are arched and Trim ornaments the corners. The roof is hipped. The County Circuit Court courtroom is located on the second story. The building houses the County Circuit Court of the 1st Judicial Circuit. The cupola from the former courthouse is located on the north side of the courthouse.
See: The 1st Judicial Circuit includes Clark County, Scotland County and Schuyler County.
History: The county was created in 1836 and Waterloo was selected as the county seat in 1837. The first courthouse was designed by Joseph McCoy and built in Waterloo in 1837 to 1839 at a cost of $4,700. The county seat was moved to Alexander in 1847. The second courthouse was a two story brick structure built by Ephraim Warner in Alexander in 1847 to 1849. The Waterloo courthouse was repaired by Whiting Johnson in 1855 in for reuse when the county seat was returned to Waterloo in 1854. The county seat was moved to Kahoka in 1865. The third courthouse was constructed in 1871 to 1872 at a cost of $18,985. During construction, Peter S Washburn was the superintendent. The fourth and present courthouse was constructed in 2012 to 2013.
Former County Courthouse ( demolished ) – Kahoka
Photos taken 2008