The last day to mail in your election ballot is Friday, Oct. 31 . But if it's too late for you to mail it in in time for the Nov. 4 election, there are various sites where you can drop off your ballot in person. Remember, many counties are holding mail-only elections so there will be no polling place for you to drop your ballot off.

The following is a list of places where you can drop off your ballot:

ADAMS COUNTY

Northridge DMV, 1865 W. 121st Ave., Suite 601, Westminster

Westminster city clerk, 800 W. 92ndAve.

ARAPAHOE COUNTY

Watkins/Front Range Airport DMV, 5150 Front Range Parkway, Aurora (Wednesdays and Thursdays only)

Aurora city clerk, 15151 E. Alameda Parkway, first floor

Main office, 5334 S. Prince St., Littleton (7 a.m. to 4:30 p.m., Monday through Friday)

Aurora branch, 15561 E. Iliff Ave. (7 a.m. to 4:30 p.m., Monday through Friday)

Southeast branch, 12600 E. Arapahoe Road, Building C, Suite B,

Centennial (7 a.m. to 4:30 p.m., Monday through Friday)

Byers branch, 538 North U.S. 36 First National Bank building, Byers (8 a.m. to 4:30 p.m., Monday through Friday)

BOULDER COUNTY

Boulder County clerk, 1750 33rd St., Boulder

County Courthouse East Wing, 2025 14th St., Boulder

Longmont annex, 529 Coffman St.

Louisville Recreation Center, 900 W. Via Appia, Louisville

BROOMFIELD

Residents will be able to vote early at the Broomfield Municipal Center through Friday. Call the Broomfield Elections Department for more information (303) 438-6213.

DENVER

Main Election office, 200 W. 14th Ave., Suite 100

Grocery stores : Daily except Sunday, 10 a.m. to 6 p.m. and Tuesday, election day, 7 a.m. to 7 p.m.

Safeway:
560 Corona St.
757 E. 20th Ave.
2150 S. DowningSt.
6460 E. Yale Ave.
4860 Pecos St.
1955 S. Sheridan Blvd.
6220 E. 14th Ave.
3110 E. First Ave.
2660 Federal Blvd.

King Soopers:
1331 N. Speer Blvd.
890 Monaco St.
2810 Quebec St.

Cub Foods:
5400 S. Wadsworth Blvd.

Voters can drop off at DMV site through Monday, 8 a.m. to 5 p.m. weekdays; Tuesday, election day, 7 a.m. to 7 p.m.

Northeast DMV, Arie P. Taylor Municipal Building, 4685 Peoria St.
Northwest DMV, Safeway Plaza, 3698 W. 44th Ave.
Southeast DMV, Fairway Shopping Center, 10890 E. Dartmouth Ave.
Southwest DMV, Bear Valley Shopping Center, 3100 S. Sheridan Blvd.
Welton DMV, Five Points Plaza, 2736 Welton St.

DOUGLAS COUNTY

On Election Day (7 a.m. to 7 p.m.):
Main office, 301 N. Wilcox St., Castle Rock
Douglas DMV, 2223 W. Wildcat Reserve Parkway, Unit G-1 , Highlands Ranch
Douglas DMV, 16522 Keystone Blvd., Suite F, Parker
Parker Town Hall, 20120 Main Street, Parker

JEFFERSON COUNTY

Walk-in voting will take place through Friday at: Jefferson County Administration and Courts Building, 100 Jefferson County Parkway, Conference Room 1555, first floor, Golden (7:30 a.m. to 5:30 p.m. weekdays)

Satellite offices
Open Monday, Wednesday and Friday, 8:30 a.m. to 4:30 p.m.; Tuesday and Thursday, 7:30 a.m. to 5:30 p.m.
Arvada DMV, 6510 Wadsworth 7 Blvd., Suite 320
Evergreen DMV, 4990 Colorado 73
Lakewood DMV 2099 Wadsworth Blvd. South Jeffco DMV, 6004-A S. Kipling St.