Marsh mclennan headquarters details
1166 Ave of the Americas
New York City
New York
10036-2774
United States
1871
Location map
Open in Google MapsAll Marsh mclennan office locations
| City | State / region | Country | Type |
|---|---|---|---|
| New York City HQ | New York | United States | Headquarters |
About Marsh mclennan
Marsh mclennan (New York Stock Exchange (NYSE): MMC) is headquartered in New York City, New York, United States. Founded in 1871, the company operates across 14 countries with approximately 95,000 employees worldwide.
Where is Marsh mclennan's main office?
Marsh mclennan's main headquarters office is located at 1166 Ave of the Americas, New York City, New York 10036-2774. This serves as the company's primary corporate address and is home to its executive leadership team.
Marsh mclennan regional offices
Beyond its headquarters in New York City, Marsh mclennan maintains 85 offices across 14 countries. Regional offices span 14 countries.
Marsh mclennan contact information
The main switchboard for Marsh mclennan headquarters can be reached at 12123455000. For investor relations, visit marshmclennan.com/investor-relations.
What does Marsh mclennan do?
Marsh & McLennan Companies, Inc., doing business as Marsh, operates as a professional services firm. The Firm offers insurance brokerage, risk management, reinsurance, talent management, investment advisory, and consulting services to commercial, consumer, multinational, and public sectors. Marsh serves clients worldwide.
Frequently asked questions
Where is Marsh mclennan headquarters?
Marsh mclennan's headquarters is located at 1166 Ave of the Americas, New York City, New York 10036-2774, United States.
How many offices does Marsh mclennan have?
Marsh mclennan operates 85 offices across 14 countries as of 2026.
What is Marsh mclennan's corporate address?
The official corporate address is 1166 Ave of the Americas, New York City, New York 10036-2774.
When was Marsh mclennan founded?
Marsh mclennan was founded in 1871 and has grown to employ approximately 95,000 people worldwide.
What is Marsh mclennan's phone number?
The main phone number for Marsh mclennan headquarters is 12123455000.