Horn has a background in accounting and has experience in the real estate business. She's also involved with the St. Joseph Chamber of Commerce and other organizations in the community.
Horn says she's excited to take on the challenge since its her first time running for public office.
"I want to serve Buchanan County residents and I've always wanted to give back to my community," stated Horn.
The county's current auditor, Nancy Nash will retire. Horn is the only republican running in the race.
Primary voting begins in August followed by general election in November.