A former sergeant with the Cobb County Sheriff’s Office has announced his intention to challenge Sheriff Neil Warren over leadership of the agency in the 2020 election.

Jimmy Herndon, a Democrat, launched his website and fundraising campaign over the weekend. His platform, as described on his website, emphasizes financial accountability, transparency, employee morale and community trust.

While 2020 qualifying isn’t until next year, Cobb is expected to be highly competitive in many races and candidates have already begun fundraising and campaigning.

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(From left) State Election Board member Rick Jeffares, executive director James Mills, vice chair Janice Johnston and member Janelle King listen during an election board meeting at the Capitol in Atlanta on Wednesday, Dec. 10, 2025.

Credit: arvin.temkar@ajc.com

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Democrat Eric Gisler celebrated his Tuesday election victory at the Trappeze Pub in Athens, Ga. (AP)

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