the 1970s. Governor Terry Branstad became the longest serving state governor in U.S. history in 2015. Likewise, Christine Branstad also holds the record as the longest serving state first lady in history as well. Christine Branstad's tenure as first lady ended in 2017, following 22 years and 8,169 days in office, when Governor Terry Branstad resigned from office to become the United States Ambassador to China. She was succeeded by First Gentleman Kevin Reynolds, the first man to hold the position in Iowa's history. References Living people Year of birth missing (living people) First Ladies and Gentlemen of Iowa People from Boone County, Iowa People from Fort Dodge, Iowa