2024 Top 15 private Idaho businesses

(Updated November 2025)

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RankEmployerAverage employmentIndustry
1St. Luke's Health System16,000+Health care and social assistance
2Wal-Mart9,000+Retail trade
3St. Alphonsus Health System6,000+Health care and social assistance
4Battelle Energy Alliance5,500+Professional, scientific, and technical Services
5Micron Technology5,500+Manufacturing
6Albertsons5,000+Retail trade
8Kootenai Medical Center3,000+Health care and social assistance
9J. R. Simplot Co. 3,000+Manufacturing
12Fred Meyer (Kroger)2,000+Retail trade
14Costco2,000+Retail trade
15Idaho Power2,000+Utilities
16United Parcel Service1,500+Transportation and warehousing
17Amalgamated Sugar1,500+Manufacturing
18Idaho Environmental Coalition1,500+Waste management and remediation services
20Idaho Central Credit Unition1,500+Finance and insurance

What are business listings?

Idaho private and public businesses included in our business listings are ranked based on employment range. Businesses with more than 500 employees included in these listings gave the Idaho Department of Labor permission to release their name, employment range and industry. To have your business included in these listings, complete the Idaho Business Directory Informed Consent Release Form.

View other top private Idaho employers

2024 Top 15 public and private Idaho businesses

(Updated November 2025)

RankCompanyAverage EmploymentIndustry
1St. Luke's Health System16,000+Health care and social assistance
2Wal-Mart9,000+Retail trade
3St. Alphonsus Health System6,000+Health care and social assistance
4Battelle Energy Alliance5,500+Professional, Scientific, and Technical Services
5Micron Technology5,500+Manufacturing
6Boise State University5,500+State Government, Education
7Albertsons5,000+Retail Trade
8West Ada School District 5,000+Local Government, Education
10Kootenai Medical Center3,500+Health care and social assistance
11Boise School District3,500+Local Government, Education
12J.R. Simplot Company3,000+Manufacturing
13University of Idaho3,000+State Government, Education
15Idaho Health & Welfare2,500+State Government, Administration
16U.S. Forest Service2,500+Federal Government, Administration
17Idaho State University2,500+State Government, Education
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