Mark Lamb (sheriff)

Mark Lamb (born July 14, 1972) is an American law enforcement officer and politician who served as sheriff of Pinal County, Arizona, from January 1, 2017 until December 31, 2024. He is a member of the Republican Party. Lamb previously served in the Salt River Pima–Maricopa Indian Community police department.

He ran unopposed for re-election as sheriff in 2020. He was a Republican candidate for the U.S. Senate in 2024 looking to replace incumbent independent Kyrsten Sinema after Sinema declined to seek re-election. He was defeated in the primary by Kari Lake, finishing second.

Lamb stepped down from the Sheriff’s office on December 31, 2024. He was succeeded by Sheriff Ross Teeple, who took office on January 1, 2025.