Iron Mountain headquarters details
- Street address
- 85 New Hampshire Avenue, Suite 150
- City
- Portsmouth
- State / region
- New Hampshire
- ZIP / postal code
- 03801
- Country
- United States
- Phone
- +1 800 899 4766
- Founded
- 1951
- Website
- ironmountain.com
- Stock
- NYSE: IRM
Location map
Open in Google MapsAll Iron Mountain office locations
| City | State / region | Country | Type |
|---|---|---|---|
| Portsmouth HQ | New Hampshire | United States | Headquarters |
Showing the headquarters of 24 recorded locations. See every location in GraphIQ →
About Iron Mountain
Iron Mountain (NYSE: IRM) is headquartered in Portsmouth, New Hampshire, United States. Founded in 1951, the company has 24 recorded locations across 3+ countries and employs approximately 29,400 people worldwide.
Where is Iron Mountain's main office?
Iron Mountain's main headquarters office is located at 85 New Hampshire Avenue, Suite 150, Portsmouth, New Hampshire 03801, United States. This is the company's primary corporate address.
Iron Mountain regional offices
Beyond its headquarters in Portsmouth, Iron Mountain has recorded locations in United States, Canada and United Kingdom.
Iron Mountain contact information
The main switchboard for Iron Mountain headquarters can be reached at +1 800 899 4766. Official website: ironmountain.com.
What does Iron Mountain do?
Iron Mountain Incorporated is a storage and information management company. The Company provides records management, data management solutions, and information destruction services. Iron Mountain serves banking, energy, entertainment, health care, insurance, law firm, life science, retail, and pharmaceutical industries worldwide.
Iron Mountain competitors & similar companies
Frequently asked questions
Where is Iron Mountain headquarters?
Iron Mountain's headquarters is located at 85 New Hampshire Avenue, Suite 150, Portsmouth, New Hampshire 03801, United States.
How many offices does Iron Mountain have?
GraphIQ records 24 locations for Iron Mountain across 3+ countries, as of October 2026.
What is Iron Mountain's corporate address?
The corporate headquarters address is 85 New Hampshire Avenue, Suite 150, Portsmouth, New Hampshire 03801, United States.
When was Iron Mountain founded?
Iron Mountain was founded in 1951 and employs approximately 29,400 people.
What is Iron Mountain's phone number?
The main phone number for Iron Mountain headquarters is +1 800 899 4766.
How many employees does Iron Mountain have?
Iron Mountain has approximately 29,400 employees (GraphIQ estimate, 2026).
Is Iron Mountain a public company?
Yes. Iron Mountain is publicly traded on NYSE under the ticker IRM.