a part of Iowa Territory upon its formation on July 4, 1838.

The first courthouse was a simple wood-framed building. In 1840, a second courthouse, measuring 40' x 20' (about 12 x 6 m), was constructed of stone. In 1854, a third structure was built. The courthouse used today was erected in 1928.

Geography

According to the United States Census Bureau, the county has a total area of 418 sqmi, of which 402 sqmi is land and 16 sqmi (3.8%) is water. Its eastern border is

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