Idaho— USA

Companies in Idaho

397.7K companies registered in Idaho, sourced from official business registers and enriched with industry, size, location and contact data. Below: the largest companies by reported revenue, and how the Idaho business base breaks down by industry and headcount.

397.7K

companies

#35

of 50 states

0.6%

of US records

industries ranked

September 2026

data updated

Part of the United States company directory.

Rankings

Largest companies in Idaho

By reported (actual) revenue, updated September 2026. Public-sector entities are excluded.

#	Company	Industry	City	Revenue (USD)	Employees
1	Albertsons Companies, Inc.	Retail sale in non-specialised stores with food, beverages or tobacco predominating	Boise	$83.2B	280,000
2	Micron Technology, Inc.	Manufacture of electronic components and boards	Boise	$37.4B	53,000
3	Boise Cascade Company	Wholesale of wood, construction materials and sanitary equipment	Boise	$6.4B	7,660
4	St. Luke's Health System, Ltd.	Hospital activities	Boise	$4.5B	7,891
5	St. Luke's Regional Medical Center, Ltd.	Hospital activities	Boise	$2.7B	4,500
6	Idacorp, Inc.	Electric power generation, transmission and distribution	Boise	$1.8B	2,174
7	Idaho Power Company	Electric power generation, transmission and distribution	Boise	$1.8B	2,166
8	Saint Alphonsus Regional Medical Center Inc.	Business and other management consultancy activities	Boise	$1.5B	40
9	Hecla Mining Company	Mining of other non-ferrous metal ores	Coeur d'Alene	$1.4B	1,865
10	Hope Harrisons	Other human health activities	Meridian	$1.2B	25
11	Petiq, Inc.	Manufacture of pharmaceutical preparations	Eagle	$1.1B	1,933
12	United Hospice	Hospital activities	Meridian	$1.1B	3
13	Hpa Idaho, LLC	Other human health activities	Meridian	$1.1B	128
14	US Ecology, Inc.	Collection of non-hazardous waste	Boise	$988M	3,600
15	The Pennant Group Inc	Other human health activities	Eagle	$948M	9,700
16	Saint Alphonsus Regional Medical Center, Inc.	Hospital activities	Boise	$924M	3,500
17	Esi Holdings, Inc.	Construction of residential and non-residential buildings	Meridian	$842M	1,000
18	Kootenai Hospital District	Hospital activities	Coeur d'Alene	$813M	2,776
19	Idaho Central Credit Union	Other credit granting	Chubbuck	$739M	335
20	Clearwater Analytics Holdings, Inc.	Software publishing	Boise	$731M	3,000
21	St. Luke's Magic Valley, Inc.	Hospital activities	Twin Falls	$522M	1,580
22	Mountain View Hospital, LLC	Hospital activities	Idaho Falls	$502M	420
23	Joint School District 2	Primary education	Meridian	$440M	4,000
24	Eastern Idaho Health Services, Inc.	Hospital activities	Idaho Falls	$425M	309
25	Engineered Structures, Inc.	Construction of residential and non-residential buildings	Meridian	$403M	870

Top 25 by revenue reported to the register. Companies filing no revenue figure are not ranked, whatever their size.

Albertsons Companies, Inc. leads Idaho at $83.2B in reported revenue, from Boise.

Coverage

Companies by industry in Idaho

The industries holding the most companies, by NACE activity code.

Other business support service activities n.e.c.8299

21,186

Construction of residential and non-residential buildings4120

15,066

Business and other management consultancy activities7022

12,496

Non-life insurance6512

10,881

Management of real estate on a fee or contract basis6832

10,760

Trusts, funds and similar financial entities6430

10,519

Mixed farming0150

9,537

Other human health activities8690

9,525

Activities of other membership organisations n.e.c.9499

8,935

Restaurants and mobile food service activities5610

8,727

Real estate agencies6831

8,078

Repair of other personal and household goods9529

7,413

General medical practice activities8621

7,310

Maintenance and repair of motor vehicles4520

6,910

Other specialised construction activities n.e.c.4399

6,580

Ranked by number of companies. Each record carries its NACE code alongside SIC and NAICS, so the same segment can be pulled in any of the three schemes.

Browse these directories

Other business support service activities n.e.c. is the largest activity in Idaho, with 21,186 companies.

Distribution

Company size

By number of employees.

1-4

354,952

5-9

20,636

10-19

6,564

20-49

4,075

50-99

1,618

100-199

620

200-499

331

500-999

112

1000+

101

8,712 companies have no disclosed headcount (excluded from the chart).

91% of Idaho companies with a disclosed headcount fall in the 1-4 employee band.

Data coverage

What a Idaho record carries

Share of the state's companies holding each contact field.

21%

with a website

39%

with a phone number

14%

with an email address

Counted against the 397.7K companies in Idaho. Firmographics — industry, size, address, status — are present on every record.

FAQ

Companies in Idaho — frequently asked questions

There are 397.7K companies registered in Idaho in the InfobelPRO database, across every sector from sole proprietorships to large enterprises.

By revenue reported to the register, the largest company headquartered in Idaho is Albertsons Companies, Inc., based in Boise, in retail sale in non-specialised stores with food, beverages or tobacco predominating.

Other business support service activities n.e.c. (21,186 companies), Construction of residential and non-residential buildings (15,066 companies), Business and other management consultancy activities (12,496 companies) lead the Idaho business base by number of companies.

Registered name and address, industry classification in NACE, SIC and NAICS, company status and legal form, employee band, reported revenue where filed, and contact fields — website, phone and email — where available.

Yes. The Idaho file is available as a bulk export or through the API, filtered by industry, company size, city or revenue. Licensing is on volume and use, not per seat.

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