Illinois held its primaries on March 17, 2026. In Massac County, the Constitution Party is a ballot-qualified party, so a primary was held for it. The party is only permitted to nominate for partisan county office. It is a qualified party in Massac County because in November 2024, its nominee for County Commission-at-large, Tim Pearcy, polled 11.8%. The race also had a Republican and a Democrat running. Illinois lets a party that polls at least 5% for a countywide office be a qualified party within that particular county.
At the March 17 primaries, the Constitution Party ballot was chosen by only one voter.
Massac County has a population of approximately 12,000. It is on the southern border of Illinois, against the Ohio River, adjoining Kentucky.