Douglas County elections officials are working late to make sure people have a chance to vote in the upcoming primary elections.

The Douglas County Clerk’s Office will be open until 9 p.m. today and Monday to accept voter registrations. Monday is the registration deadline for people wanting to vote in the federal, state and local primaries Aug. 3.

Voter registration forms online

“It’s just a service we provide,” County Clerk Patty Jaimes said of the extended hours. “We want to make sure people have a chance to register and to get their registrations updated, if they’ve moved.”

Advance voting already is under way, and dozens of people have cast ballots outside the clerk’s office at the County Courthouse, 1100 Mass.

Advance voting is open from 8 a.m. to 5 p.m. weekdays through noon Aug. 2, the day before the primary. The courthouse polling place also will be open from 10 a.m. to noon Saturday, July 31, to accommodate people unable to make the trip during normal business hours.

Advance voting opened Wednesday, and in the first two days 49 people have cast primary ballots in person. Another 385 ballots went out this week by mail; ballots sent earlier to military personnel — including those in Iraq and otherwise deployed — are starting to trickle in. Ten ballots already have come in from the military post offices.

“I don’t know where they are, but it’s great that they’re voting while they’re serving their country,” said Marni Penrod, deputy county clerk for elections.