Hampshire County Sheriff Patrick Cahillane won the three-way Democratic primary, but with less than 50% of the vote. That led one of his challengers, Yvonne Gittelson, to launch a write-in campaign.
Democrat: Hampshire County Sheriff Patrick Cahillane (website, campaign finance)
Republican: no candidate
Write-in: Yvonne Gittelson, corrections specialist with state education department (website, campaign finance)