Who is running for Platte County Clerk in 2026?

Democratic nominee, Platte County Clerk

Hans Peter, a Democrat, is on the Nov. 3, 2026 ballot for Platte County Clerk against Republican Mary Calvillo¹. The sources reviewed document his candidacy but give no biography²³.

• The Platte County Landmark reported in January 2026 that he had formed a campaign committee for a run for County Clerk³, and in July 2026 that he was the Democratic candidate awaiting the winner of the Republican primary². The November ballot lists him as the Democratic nominee¹.

Republican nominee, Platte County Clerk

Mary Calvillo, a Republican, is on the Nov. 3, 2026 ballot for Platte County Clerk against Democrat Hans Peter¹. The Platte County Landmark reports she has more than 45 years of office management experience and says her priorities are modernizing the clerk's records and website, faster senior tax credit processing and office hours until 5 p.m.²³.

• More than 45 years in office management, executive assistance, supervision and customer service, per the Platte County Landmark³
• Degree in personnel management and international marketing from Missouri State University; 15 years in the travel industry as a flight attendant and hotel front desk supervisor³
• Member of the Platte County Republican Central Committee³
• Ran in the Aug. 4, 2026 Republican primary for County Clerk against incumbent Jera Pruitt and Russell Wojtkiewicz³. The November ballot lists her as the Republican nominee¹. The incumbent clerk, Jera Pruitt⁴, is not on the November ballot¹.