The Gem State is defined by its rugged mountains, sprawling valleys, and welcoming Western cities. Idaho’s most-populated communities, from Boise to Rexburg, offer a compelling blend of history, innovation, and access to the state’s stunning landscapes.
Idaho’s biggest urban centers stand out for their contributions to agriculture, particularly its world-famous potatoes, and their proximity to natural wonders like Craters of the Moon National Monument. Experience everything from Boise’s Basque traditions and Caldwell’s flourishing wine industry to Shoshone Falls in Twin Falls, Idaho. On top of all that, the state has world-class ski slopes and mineral hot springs
Here are the ten biggest cities in Idaho, in order of the highest to lowest populations:
1. Boise, ID
Boise is the state capital and Idaho’s largest city, home to 235,684 residents as of the 2020 census. Located along the Boise River, “The City of Trees” boasts a vibrant downtown area, a thriving tech industry, and numerous green spaces that cater to outdoor enthusiasts. Boise State University, famous for its iconic blue football field, brings youthful energy and innovation to the city.
Visitors enjoy the Boise Greenbelt, a 25-mile pathway that connects parks and scenic spots along the river. Cultural attractions like the Boise Art Museum and the historic Old Idaho Penitentiary highlight the city’s dedication to art and history. Additionally, the Idaho Botanical Garden offers a peaceful retreat featuring native plants and educational programs.
Boise is also home to Freak Alley Gallery, an outdoor mural space showcasing street art and creativity. The Basque Block, a tribute to the city’s Basque heritage, offers unique dining and cultural experiences.
Learn about the ski resorts near Boise.
2. Meridian, ID
Idaho’s second-largest city had a population of 117,635 in 2020. Located just west of Boise, Meridian is one of the fastest-growing cities in the state, featuring a unique blend of suburban charm and modern conveniences.
The Village at Meridian, an open-air shopping and entertainment center, serves as a popular gathering spot with retail stores, dining options, and live entertainment. Parks like Settlers Park and Julius M. Kleiner Memorial Park offer playgrounds, walking trails, and sports facilities, hosting events throughout the year.
Meridian also celebrates its agricultural roots with the annual Meridian Dairy Days Festival. This long-standing tradition includes parades, live music, and local food, bringing the community together in celebration. One of the top places to live in the state, Meridian is nicknamed “The Center of the Treasure Valley”.
3. Nampa, ID
Nampa is called “The Heart of the Treasure Valley” and has deep agricultural roots. The city of 100,200 in 2020 hosts the Snake River Stampede, one of the country’s top rodeos. Its historic downtown features unique shops, restaurants, and landmarks like the Nampa Train Depot Museum.
Outdoor enthusiasts can visit Lake Lowell, a scenic destination for fishing, boating, and birdwatching. The city’s Ford Idaho Center hosts concerts, equestrian events, and trade shows, making it a cultural hub for the region. Nampa also features several golf courses and parks that cater to active lifestyles.
Nampa also prioritizes arts and education through venues like the Civic Center and the Hispanic Cultural Center of Idaho. These institutions enrich the community by offering performances, exhibits, and workshops.
4. Caldwell, ID
Caldwell, home to 59,996 residents as of 2020, is nicknamed “The Treasure of the Valley”. It’s popular as the gateway to Idaho’s wine country, serving as the starting point of the Sunnyslope Wine Trail, which boasts some of the state’s finest vineyards and wineries. Its strong agricultural heritage continues to shape the local economy and culture.
Indian Creek Plaza has transformed the city’s downtown into a vibrant gathering space, hosting events like the Winter Wonderland Festival and summer concerts. The College of Idaho, the state’s oldest private liberal arts college, enhances the city with educational programs and cultural events. Visitors can also explore the Orma J. Smith Museum of Natural History located on campus.
Caldwell is also home to the Whittenberger Planetarium, located at the College of Idaho. This venue offers immersive shows that inspire curiosity about space and science.
5. Idaho Falls, ID
Idaho Falls was home to 64,818 in 2020, and serves as an economic hub for eastern Idaho. The city’s namesake waterfalls are surrounded by the scenic Idaho Falls River Walk, a favorite spot for walking, biking, and picnicking.
The Museum of Idaho showcases engaging exhibits on history, science, and culture, while the Idaho Falls Zoo at Tautphaus Park provides family-friendly attractions. The Idaho National Laboratory, a leader in nuclear energy research, plays a significant role in the city’s economy.
Freeman Park, a sprawling green space along the Snake River, has sports facilities, picnic areas, and a tribute to local veterans. This park highlights Idaho Falls’ commitment to outdoor recreation and community. Additionally, the nearby Snake River Landing features shops, dining options, and event spaces that draw both locals and visitors.
6. Pocatello, ID
Referred to as “The Gate City”, Pocatello had a population of 56,320 as of the 2020 census. Other nicknames include “Poky” and “U.S. Smile Capital”. The city serves as a gateway to outdoor adventures in southeastern Idaho and is home to Idaho State University, a major driver of educational and cultural activities.
The Bannock County Historical Museum and Fort Hall Replica provide insights into the region’s pioneer history. Old Town Pocatello offers a charming mix of shops, eateries, and events that reflect the city’s community spirit. The district also features vibrant murals and historic buildings that showcase the area’s heritage.
Pocatello also hosts Zoo Idaho, a unique zoological park dedicated to species native to the Intermountain West. This attraction provides educational opportunities for residents and visitors alike.
7. Coeur d’Alene, ID
Coeur d’Alene (aka “CDA”) is a picturesque city on the shores of Lake Coeur d’Alene. Well-liked for its stunning lake views and outdoor activities, it attracts visitors year-round and in 2020 had a population of 54,628. Tubbs Hill and the Coeur d’Alene Resort Golf Course, featuring the world’s only floating green, are iconic attractions. You can also visit Mt. Spokane Ski & Snowboard Park in neighboring Washington in an hour, making CDA a bit of a ski town.
Downtown Coeur d’Alene has boutique shops, art galleries, and waterfront dining, while annual events like the Ironman Triathlon bring the community together. The city’s McEuen Park provides a state-of-the-art playground, trails, and picnic areas. Visitors to “Lake City” can enjoy boat cruises on Lake Coeur d’Alene, which showcases stunning views and wildlife sightings.
CDA is also known for its annual Wooden Boat Show, which celebrates maritime craftsmanship and draws enthusiasts from across the Northwest. The North Idaho Centennial Trail, a scenic path stretching over 23 miles, provides opportunities for biking, walking, and enjoying stunning views of the lake and surrounding landscape.
8. Twin Falls, ID
Twin Falls is named for the two waterfalls on the Snake River that define its landscape. Shoshone Falls, often called the “Niagara of the West”, is a breathtaking natural attraction just minutes from downtown. In 2020, the city had a population of 51,807 residents.
The Perrine Bridge, spanning the Snake River Canyon, offers panoramic views and is a popular spot for BASE jumping. The city’s agriculture and food processing industries, with companies like Chobani and Clif Bar, drive its economy.
Twin Falls also features the Herrett Center for Arts and Science, which includes a planetarium, art exhibits, and cultural artifacts. This venue highlights the city’s commitment to education and cultural enrichment.
9. Post Falls, ID
Neighboring Coeur d’Alene in northern Idaho, Post Falls had a population of 38,485 in 2020. The Spokane River flows through the city, providing fishing, boating, and riverside recreation opportunities. Falls Park showcases scenic trails and picnic areas, making it a local favorite.
Events like Post Falls Days celebrate the city’s community spirit with parades, live music, and family-friendly activities. The city’s proximity to outdoor destinations adds to its appeal for nature enthusiasts.
Post Falls also boasts Q’emiln Park Climbing Area, a popular destination for rock climbers. This popular site combines adventure with stunning forested views.
10. Rexburg, ID
Called the “Gateway to Yellowstone” due to its proximity to the national park, Rexburg is another fast-growing city in Idaho. At the time of the 2020 census, there were 39,409 residents living in Rexburg. The city is home to Brigham Young University-Idaho, which fosters a vibrant and youthful atmosphere.
The Legacy Flight Museum and Teton Flood Museum provide fascinating insights into the area’s history. Outdoor enthusiasts can explore Henry’s Fork of the Snake River, a prime spot for fishing and wildlife observation.
Rexburg’s annual Idaho International Dance Festival showcases cultural performances from around the globe, highlighting the city’s commitment to diversity and the arts. The Rexburg Rapids Aquatic Center offers a family-friendly destination with pools, slides, and summer activities, adding to the city’s appeal.
Idaho’s largest cities reflect the state’s rich history, natural beauty, and dynamic growth. People are moving here in droves. From Boise’s thriving cultural scene to Rexburg’s educational opportunities, these cities offer something for everyone to enjoy and explore.
10 Largest Cities in Illinois by Population