King County Elections certified the results of 2013 primary election today. Voters returned 347,020 ballots for a final turnout of 29 percent.

Final results are available on the department’s website.

There were no Mercer Island specific races this primary season, but in the race for King County Executive, incumbent Dow Constantine received 76.5 percent of the vote and Alan E. Lobdell collected 11.95 percent to move on to the general election.

Finally, the King County Parks Levy also passed, with 70. 2 percent of voters voting for it.

Citizens can register to vote or update their registration by Oct. 7 to vote in the Nov. 5 general election.

Primary election by the numbers:

Ballots issued: 1,195,974

Registered voters: 1,187,888

Ballots returned: 347,020

Ballots counted: 340,236

Voters using Accessible Voting Units: 106

Ballots accessed online: 1,916

Ballots returned at drop boxes: 51,241

Ballots with signature challenges: 7,737

Ballots with remaining signature challenges: 2,486

Returned too late: 4,163

Returned as undeliverable: 17,911

To learn more, visit the King County elections website.