Marin County Board of Supervisors races in Districts 1 and 5 were both for open seats on Tuesday’s ballot because incumbents Damon Connolly and Judy Arnold did not run.

Novato Mayor Eric Lucan appears to have won the seat in District 5 with 66 percent of the vote, while Mary Sackett, a top aide to Connolly, appeared to be right around the 50 percent threshold needed to avoid a November runoff for the District 1 seat, according to unofficial election results from the county.

Connolly was running for a state Assembly seat representing the region — he is headed to a runoff in November in that race after Tuesday’s results — while Arnold announced in April that she would not seek re-election.

Candidates for District 1 along with Sackett included Gina Daly, a member of the San Rafael City Schools Board of Education, and George Saribalis, owner of Saribalis Construction.

Sackett was just barely over the 50 percent threshold to avoid a runoff as of the latest numbers released by the county, while Daly had 37 percent and Saribalis just under 12 percent, according to the unofficial results.

Sackett’s platform leaned on her prior experience in local government as she was a top aide for Connolly.

Lucan appeared to win the District 5 seat with 66 percent of the vote, and Colin Medalie, a Marin County sheriff’s deputy, followed with 17 percent, according to unofficial results. Nonprofit advocate and communications consultant Kevin Morrison was the third-place candidate finishing with almost 11 percent. Homeless advocate and the fourth candidate Jason Sarris had just over 4 percent.

Lucan carried a strong lead throughout the race but a mailer by Morrison on June 2 stated that Lucan’s church, the New Life Church in Novato, subscribes to anti-gay beliefs. Lucan has since denied this and has openly discussed his support for the LGBTQ community in campaign material.