Ada County, Idaho clerk's office: address and phone for 2026
The Idaho Secretary of State lists the Ada County Clerk at 400 N. Benjamin Lane, Ste 100, Boise, ID 83704, phone 208-287-6860. Idaho: Early voting opens Tuesday, October 13; early voting ends Friday, October 30. Ask this office for its early voting locations and hours.
Ada County clerk's office
Ada County Clerk
Office: 400 N. Benjamin Lane, Ste 100, Boise, ID 83704
Phone: 208-287-6860
Website: adacounty.id.gov/elections
Check your registration and find your polling place at VoteIdaho.gov, the state's voter site.
Idaho voting dates for Ada County voters
| Date | What |
|---|---|
| Tue, Oct 13 | Early voting opens Early and in-person absentee voting runs Oct 13–30 at locations set by each county. Hours vary by county. source |
| Fri, Oct 23, 5:00 PM | Request an absentee ballot Request by 5 p.m. at VoteIdaho.gov or from your county elections office. source |
| Fri, Oct 23 | Pre-register online Online pre-registration closes at midnight; paper forms are due at your county clerk by 5 p.m. You can also register at your polling place on Election Day. source |
| Fri, Oct 30 | Early voting ends Last day of early and in-person absentee voting. Hours vary by county, so check yours before you go. source |
| Tue, Nov 3, 8:00 PM | Election Day: polls open 8:00 a.m. to 8:00 p.m. Local time. Southern Idaho is on Mountain Time; the northern panhandle is on Pacific Time. source |
| Tue, Nov 3, 8:00 PM | Register and vote at the polls Register at your polling place on Election Day. Polls are open 8 a.m.–8 p.m. source |
| Tue, Nov 3, 8:00 PM | Return your absentee ballot Your ballot must arrive at your county elections office by 8 p.m. on Election Day. source |
Ada County voting questions
What is the phone number for the Ada County clerk's office?
208-287-6860, the Clerk (Ada County's clerk's office on the Idaho Secretary of State, Find Your County Clerk list).
What is the address of the Ada County clerk's office?
400 N. Benjamin Lane, Ste 100, Boise, ID 83704.
When does early voting start in Ada County?
Early voting opens Tuesday, October 13; early voting ends Friday, October 30, 2026. Early and in-person absentee voting runs Oct 13–30 at locations set by each county. Hours vary by county.
More for Idaho voters
- Who is on the Idaho ballot: every candidate on the state's official list, race by race.
- Idaho voting deadlines 2026: registration, mail ballots, early voting and Election Day.
- Every Idaho county's office.
- Early voting dates in every state.
Other Idaho counties: Adams, Bannock, Bear Lake, Benewah, Bingham, Blaine, Boise, Bonner, Bonneville, Boundary, Butte, Camas, Canyon, Caribou, Cassia, Clark, Clearwater, Custer, Elmore, Franklin, Fremont, Gem, Gooding, Idaho, Jefferson, Jerome, Kootenai, Latah, Lemhi, Lewis, Lincoln, Madison, Minidoka, Nez Perce, Oneida, Owyhee, Payette, Power, Shoshone, Teton, Twin Falls, Valley, Washington.
Office details are from the Idaho Secretary of State, Find Your County Clerk (checked October 14, 2026). Dates are Idaho's, each linked to its source. Call the office before you go.