Clay County is situated in the second tier of counties south of the State of Nebraska, about one hundred miles west of the Missouri River, and lies on the east side of the sixth principal meridian. It is bounded on the north by Washington, on the east by Riley and Davis counties, on the south by Dickinson, and on the west by Ottawa and Cloud counties, between which extends the sixth principal meridian. It lies wholly within the valley of the Republican River, which enters at the northwest corner, and flows southeast through the center of the county, one-half of which consists of first and second bottom lands. It is, therefore, destined to be one of the richest agricultural counties in the State. Source: Cutler's History of the State of Kansas 

County Seat: Clay Center

Date organized:1866

County History:

1. Cutler's History of the State of Kansas, Clay county 
2. Clay County, Kansas History at the Kansas Historical Society

Historic Landmarks, State, National:

1. Mugler Lodge Site
2. Auld Stone Barn

County Historical Society:

Clay County Historical Society

Websites about the county:

1. Clay County, Kansas Government
2. City of Clay Center