Henry County, Iowa: History
Henry County was formed on December 7, 1836, under the jurisdiction of Wisconsin Territory, and became a part of Iowa Territory when it was formed on July 4, 1838. It was named for General Henry Dodge.
The county's first courthouse was built in 1839–1840. A larger courthouse was built in 1871, and the present courthouse was raised in the 20th century, being placed into service on August 4, 1914.