Lyft said that those in participating markets can access the promotion through the "Deal of the Week" email they receive Sunday night.
Uber, another popular rideshare company, will offer $20 off the first ride for new users with the code VOTETODAY. Existing users can take advantage of Uber's partnership with Google and use the app to find their polling stations by entering the address where they're registered to vote.
Car-sharing network Zipcar said it will make over 7,000 vehicles free for members to use for carpooling to polls from 6 p.m. to 10 p.m Tuesday in all markets where it is available.
Here are the other markets where Lyft will offer 45 percent off for a single trip on Election Day:
Charlotte, North Carolina
Minneapolis-St. Paul, Minnesota
New Orleans, Louisiana
New York City and New Jersey
Orange County, California
Raleigh, North Carolina
San Diego, California
Washington, District of Columbia
Happy riding and happy voting.
Kelcie Willis with the Cox Media Group National Content Desk contributed to this story.