Snohomish County voters can drop off their ballots at grocery stores and coffee shops across the county Monday and Tuesday.

As of Thursday, more than 51,000 ballots had been returned, although that’s just 15 percent of the 334,000 mailed to voters.

Voters can also cast their ballots on electronic voting machines at many libraries. The machines are intended for disabled voters but can be used by people who prefer to use the machines instead of mail-in ballots.

Ballots must be postmarked no later than Nov. 6. Call 425-388-3444 to reach the county elections department or go online to www. snoco.org to track a returned ballot. The auditor’s office at 3000 Rockefeller Ave., Everett, is open weekdays 9 a.m. to 5 p.m. for ballots and electronic voting machines, plus 7 a.m. to 8 p.m. on Election Day.

Locations are open from 2 to 8 p.m. on Monday. On Tuesday, Election Day, locations are open from 7 a.m. to 8 p.m.

Ballot collection centers

Arlington Food Pavilion: 146 Haller St. E.

Arlington Starbucks: 3617 172nd Ave. NE

Bothell QFC: 22833 Bothell-Everett Highway

Edmonds QFC: 22828 100th Ave. W.

Everett QFC: 4919 Evergreen Way

Everett QFC: 2615 Broadway

Gold Bar Family Grocer: 1111 Croft Ave.

Granite Falls Red Apple: 115 N. Granite Ave.

Lake Stevens Joe’s: 519 Highway 9

Lynnwood QFC: 17525 Highway 99

Lynnwood QFC: 7500 196th St. SW

Marysville Staples: 105 Fourth St.

Marysville Starbucks: 3701 88th St. NE

Mill Creek QFC: 926 164th St. SE

Monroe Galaxy Theaters: 1 Galaxy Way

Mountlake Terrace QFC: 22803 44th Ave. W.

Mukilteo QFC: 11700 Mukilteo Speedway

Snohomish Starbucks: 1101 Ave. D

Stanwood QFC: 27008 92nd Ave. NW

Sultan Red Apple: 807 W. Stevens Ave.

Voting machines and ballot collection sites

Edmonds Sno-Isle Library: 650 Main St.

Lynnwood Sno-Isle Library: 19200 44th Ave. W.

Marysville Sno-Isle Library: 6120 Grove St.

Mill Creek Sno-Isle Library: 15429 Bothell-Everett Highway

Monroe Sno-Isle Library: 1070 Village Way

Mountlake Terrace Sno-Isle Library: 23300 58th Ave. W.

Mukilteo Sno-Isle Library: 4675 Harbour Pointe Blvd.

Snohomish Sno-Isle Library: 311 Maple Ave.

Stanwood Sno-Isle Library: 9701 271st St. NW.