Is Boise red or blue? The city itself is blue: Boise votes Democratic in presidential elections, elects a Democratic mayor and city council, and sends Democrats to the Idaho statehouse. But Boise sits inside Ada County, which leans Republican and has been trending further right, and inside Idaho, one of the most Republican states in the country. The honest answer is all three at once.
How Boise Neighborhoods Actually Vote
Countywide numbers hide how sharply Boise’s neighborhoods diverge. Central Boise and the North and East Ends are Democratic strongholds. Joe Biden topped nearly 88% in parts of the North End in 2020, and Kamala Harris still pulled around 83% there in 2024. Those precincts look nothing like the rest of Idaho.
Move outward and the map flips. Southern Ada County precincts gave Donald Trump about 65% in 2016 and nearly 75% by 2024. The northwestern suburbs around Eagle and Star swung harder still, from roughly 63% for Trump in 2016 to over 80% in 2024. Precincts along the Meridian-Boise border are the closest thing to swing territory, some decided by fractions of a percentage point.
Who Runs the City
Boise’s government reflects its urban core rather than its suburbs. Mayor Lauren McLean, a Democrat, took office in January 2020 and won re-election in November 2023.{1Ballotpedia. Lauren McLean} Boise mayoral races are officially nonpartisan, but candidates’ affiliations are generally well known.
The six-member city council has been elected by district since 2021, replacing an at-large system. In the November 2025 council elections, Colin Nash, Jordan Morales, and Jimmy Hallyburton won their seats without serious challenge from the right. The council has consistently tilted toward candidates aligned with Boise’s progressive urban voters, and district-based elections reinforce that by giving central-city neighborhoods dedicated representation.
Boise’s Delegation at the Statehouse
State legislative districts covering central Boise are among the only places in Idaho where Democrats win. In 2024, Democrats swept all four Senate seats and all eight House seats in Districts 16 through 19, which cover the city’s urban core.{2Ballotpedia. Idaho State Legislative Election Results, 2024} Several of those lawmakers hold caucus leadership roles. Senator Melissa Wintrow of District 19 serves as Senate Minority Leader, Senator Janie Ward-Engelking of District 18 chairs the Senate Minority Caucus, and Representative Ilana Rubel of District 18 leads the House minority.
That concentration matters because Democrats have almost no presence elsewhere in Idaho. After the 2024 elections, the party held just 15 of the state’s 105 legislative seats. Republicans have controlled a supermajority in both chambers since 1993.{3KISU. Republicans Poised to Retain Supermajority in Idaho Legislature} Boise’s Democratic delegation is a small island in an overwhelmingly Republican statehouse.
The County Around Boise Is Getting Redder
Ada County, which surrounds Boise and includes Meridian, Eagle, and Star, tells a different story than the city. In 2020, Trump carried Ada County with about 50.3% of the vote to Biden’s 46.4%, a margin of roughly four points.{4Idaho Secretary of State. 2020 General Election Results – Statistics} That narrow gap contrasted with the statewide result, where Trump won Idaho with 63.8%.{5Idaho Secretary of State. 2020 General Election Results – Statewide}
In 2024, Ada County moved further right. Trump took 53.8% to Harris’s 43.4%, widening the Republican margin to more than ten points. Statewide, Trump won with 66.9%.{6AP News. 2024 Idaho Election Results} Republican county commissioners won by their widest margins since at least 2016.
The shift is not happening uniformly. Central Boise’s Democratic vote share has barely budged. The movement is concentrated in the suburbs and exurbs: southern Ada County, Eagle, Star, and the fast-growing edges of the county. As those areas add population, their Republican tilt pulls countywide numbers to the right while the city core stays blue.
Why Boise Votes Differently From the Rest of Idaho
Several factors set Boise apart. Education is one. Nearly 48% of Boise adults aged 25 and older hold a bachelor’s degree or higher, well above national averages.{7U.S. Census Bureau. Boise City City, Idaho – U.S. Census Bureau QuickFacts} Higher educational attainment correlates with Democratic support in most of the country, and Boise fits the pattern.
Boise is also an urban center, and urban areas nationwide lean Democratic regardless of state. The city’s population reached roughly 238,000 as of 2024, up from about 206,000 in 2010.{8U.S. Census Bureau. Boise City City, Idaho – U.S. Census Bureau QuickFacts} Growth has slowed recently, but the 2010s brought in younger professionals drawn to the tech sector, outdoor access, and a lower cost of living than West Coast cities.
One common assumption about that migration turns out to be wrong. The narrative that Californians moving to Idaho are turning it purple does not match the data. According to Idaho Secretary of State voter registration records, about 77% of voters who transferred registrations from California registered as Republicans. Boise State University polling found that 65% of Californians who moved to Idaho since 2015 identified as Republican. The transplants have been reinforcing Idaho’s conservative tilt, not softening it.
When Boise and the Legislature Collide
The gap between a blue city and a red statehouse produces regular conflict. In 2024, Boise enacted rental protections that capped application fees at $30, required large landlords to accept Section 8 vouchers, and mandated the return of security deposits when buildings were demolished. Within months, the Idaho Legislature passed HB 545, a bill specifically designed to strip those protections. It cleared the Senate and was sent to the governor with a July 1 effective date.
State preemption of Boise ordinances is a recurring pattern. When the city passes protections that conflict with the legislature’s priorities, the supermajority has the votes to overrule them. That dynamic frustrates city officials but follows directly from the math: Boise votes blue, but the state it sits in does not.