City Cast Boise logo

What to Know About May’s Primary Election

Posted on April 3, 2024   |   Updated on September 30, 2025
Blake Hunter

Blake Hunter

Idaho has already essentially cast its vote for former President Donald Trump. But that vote is just the tip of the iceberg, with many more races coming in May. (Natalie Behring / Getty)

Idaho has already essentially cast its vote for former President Donald Trump. But that vote is just the tip of the iceberg, with many more races coming in May. (Natalie Behring / Getty)

Idaho’s May primary election is less than 50 days away, and the state’s most recent election clearly indicated the importance of voter communication and accessibility.

In the closed-door Republican caucus in March, just 3.4% of Idaho’s registered voters actually cast a vote for the winner of the GOP’s presidential caucus. More than 33,000 people voted for Donald Trump, which despite the million registered voters in the state was enough to make him the GOP’s — and effectively the state’s — presidential nominee.

The November general election is bound to bring in more voters, but in many ways the primary is even more important. It’s where Republicans will decide whether to tack towards traditional conservatism or to follow state leaders, and it’s where Democrats will consolidate their ranks for the best chance to compete later on.

But it’s also where less flashy, “rubber meets the road” races will be determined. We’ll hone in on individual races closer to election day, but here’s a little preparation for May’s primary.

Major Deadlines

The deadline to withdraw from the primary election just passed, so your slate of candidates is set in stone.

What’s on the Ballot

Information about county and state elections are found on different sites. Peruse the statewide races and candidates through the Secretary of State, and the county’s through the Ada County election website. But here’s the bare bones:

  • All 105 of Idaho’s state legislators are up for election in May.
  • Both of Idaho’s U.S. Representatives are up for reelection. Mike Simpson and Russ Fulcher are hoping to fend off six and three opponents respectively.
  • At the county level, two of three commissioners are on the ballot, along with the sheriff and prosecutor.

Don’t forget your county precinct committeemen — they make up the county party’s committee, directing policy and decisions. You may not even have one on the ballot, but some precincts have more than one to choose from.

Share article

Hey Boise

Thank you Boise, we’ve loved the conversation we’ve been having with you for the past three years. City Cast Boise and Hey Boise have suspended operations. Our last newsletter and podcast episode was Oct. 24, 2025.

Local Civics

See All
Local CivicsOctober 20, 2025

Meet the 2025 Boise City Council Candidates: Jimmy Hallyburton, District 6, Incumbent

Hallyburton faces perhaps the most challenging path to reelection, with former City Council member Lisa Sánchez running to unseat him, an...

Local CivicsOctober 20, 2025

Meet the 2025 Boise City Council Candidates: Lisa E. Sánchez, District 6, Challenger

Sánchez’s return to city hall would be remarkable, as her exit was marked with contention and a lawsuit. But that’s in the past: Her resu...

Local CivicsOctober 20, 2025

Meet the 2025 Boise City Council Candidates: Josh Ellstrom, District 2, Challenger

Ellstrom is a home physical therapist and political newcomer with his eye trained on political neutrality. He’s challenging West Bench in...

Local CivicsOctober 20, 2025

How Boise City Council Candidates Set Themselves Apart

Three council seats are up for election on Nov. 4. Early voting starts today, so here's what Boiseans need to know for the city council e...

Local CivicsOctober 20, 2025

Meet the 2025 Boise City Council Candidates: Colin Nash, District 2, Incumbent

Colin Nash is an incumbent but this is his first time seeking a council seat at the ballot box. In 2023, he was appointed to fill a seat...

Local CivicsOctober 20, 2025

Meet the 2025 Boise City Council Candidates: Jordan Morales, District 4, Incumbent

Morales is unchallenged in his bid for a second term representing District 4 and East Boise. Luckily, he was still kind enough to fill ou...

Local CivicsOctober 20, 2025

Meet the 2025 Boise City Council Candidates: Derek James Smith, District 2, Challenger

Another political newcomer, Derek Smith has new ideas for city hall. Autonomous buses? I’m listening. I’m also listening because his Benc...

Local CivicsOctober 7, 2025

Want to Get Involved? Here Are Some Ways to Volunteer.

We know Hey Boise readers are involved, and often want to be more involved.

There are many ways to chip in this fall — even just with your feedback. (Blake Hunter / City Cast Boise)

The latest in Boise

AnnouncementsOctober 24, 2025

Goodbye from City Cast Boise and Hey Boise

City Cast Boise and Hey Boise have suspended operations.

illustration of skyline with the capitol building, trees, and hot air balloons with "we heart boise"
Boise's BestOctober 21, 2025

Essential Rules for Surviving Boise

In Boise, you need good footwear, a curiosity for breweries, and political resilience. Here are some of the essential rules for surviving...

Cheers to thriving in Boise — or getting closer to it! (Nicolas Micolani / Getty)
Boise HistoryOctober 9, 2025

A Brief History of Colonization in the Treasure Valley (Ahead of Indigenous People's Day)

A recent outburst from North Idaho Sen. Dan Foreman shows why many Idahoans need to reckon with the state's Indigenous and colonial history.

Before Europeans arrived, this valley was a gathering place for many peoples. (Blake Hunter / City Cast Boise)
Boise, ExplainedOctober 6, 2025

Unemployment Remains Low, But Housing Affordability Stays Out of Reach

All year, much of the U.S. has braced for an economic recession, wary of tariffs, federal layoffs, and general cost-of-living. But when i...

Some Boise job markets are booming — but even in the hottest industries, pay still trails behind housing affordability. (simonkr / Getty)
Boise, ExplainedOctober 3, 2025

How Well Do You Know Idaho's Geological History?

I’m feeling a little bogged down by the news, and sometimes it’s helpful to combat that by looking into the history books.

What are a large swath of Idaho’s mountains made of? (David Radzieta / Getty)
Urban AlmanacOctober 2, 2025

Urban Almanac: Cat-Faced Orb Weaver Spiders

Most orb-weavers, including the cat-faced spider, are non-venomous to humans. And — as is clearly visible by their large webs — they play...

This is a type of orb-weaver similar to the cat-faced spider common in Boise. (Zigmunds Dizgalvis / Getty)
Boise's BestOctober 1, 2025

Your Guide to Boise in October 2025

Somehow it’s October, so this month, find a little balance between the busy times, Halloween, and cozy autumn vibes Boise brings.

We’re luckily having a beautiful fall, so make the most of it! (Blake Hunter / City Cast Boise)
Food & DrinkSeptember 26, 2025

Boise's Best New Restaurants and Bars

Here’s what’s new, and what's taken a final bow.

Slow by Slow has expanded, and changed its aesthetic. It’s worth checking out! (Blake Hunter / City Cast Boise)