SEATTLE, Wash. — Ballots were mailed to every Washington voter this year. But most apparently wound up in the recycling with the credit card and magazine offers.

Statewide turnout in the November election was 44.5 percent as of Friday — the lowest in a decade.

Yakima County had the dubious distinction of having the lowest turnout: 37.5 percent.

With several thousand ballots remaining to be counted, the statewide figure could edge up a bit. But it will remain the lowest turnout since 2003, when just 40.5 percent of voters cast ballots, according to Secretary of State Kim Wyman’s office.

Turnout is usually depressed in off-year elections, which don’t feature high-profile presidential or congressional contests to attract interest.

Since 1980, turnout in off-year elections has averaged 51 percent — which is what elections officials predicted turnout would reach this year. That compares with 79 percent in presidential-election years and 62 percent during midterm elections.

Dave Ammons, a spokesman for Wyman’s office, noted that unlike 2012 there were no highly charged issues like marijuana legalization or gay marriage on this year’s ballot.

Initiative 522, which would have required labeling of genetically engineered foods (GMOs), didn’t draw the same level of interest, despite record spending by the “no” campaign.

“GMO is a pretty abstract notion that required quite a bit of voter research, and the Eyman one (I-517) only vaguely interested people,” Ammons said in an email. “The tax advisory votes probably didn’t draw anyone to vote and, indeed, we heard from a lot of confused voters who didn’t understand the process of a nonbinding vote on something that already happened.”

The lower turnout was cited by the Yes on I-522 campaign as a factor in the initiative’s close defeat.

“We anticipated a likely lower off-year turnout in all of our strategizing about the race. But this exceeded our expectations and really was in many ways impossible to predict,” said Lisa MacLean, a political consultant who worked on the pro-I-522 campaign.

Backers vowed to try a similar measure in 2016. “I think an even-year electorate is more conducive to turnout among progressives and young voters,” MacLean said.

Turnout in King County was about 47 percent as of Friday, with thousands more votes waiting to be counted, according to King County Elections.

It was higher — about 53 percent — in Seattle, where voters decided a hard-fought mayoral race.

The highest turnout was in Jefferson County (64.6 percent).

Even with the relatively low numbers, turnout in Seattle, at least, was stellar compared with that in some other major cities.

New York’s mayoral race drew a record-low turnout of 24 percent, The New York Times reported.

And in Los Angeles, a mayoral runoff election in May drew a record-low turnout of just 23.3 percent, according to the Los Angeles Times.