Deloitte headquarters in the United States is at 30 Rockefeller Plaza in Midtown Manhattan, the Art Deco tower most people know as 30 Rock. That is the address of Deloitte LLP, the US member firm and by far the largest piece of the global Deloitte network, whose parent entity is headquartered separately in London. Because Deloitte is a private professional-services partnership rather than a consumer brand, there is no 1-800 customer service line to call. Below you will find what actually exists: the verified US and global headquarters addresses, the New York national office switchboard, every official contact channel (clients, careers, media, alumni, ethics), and the steps that work when you need to raise a concern about the firm’s work.
| US headquarters (Deloitte LLP) | 30 Rockefeller Plaza, 41st Floor, New York, NY 10112-0015, United States |
| Corporate office | Deloitte LLP, 30 Rockefeller Plaza, New York, NY 10112 (executive and national office; not a client walk-in location) |
| Global headquarters (DTTL) | Deloitte Touche Tohmatsu Limited, 1 New Street Square, London EC4A 3HQ, United Kingdom |
| New York national office phone | +1 212 492 4000 (switchboard) |
| Ethics and integrity concerns | Integrity Helpline at integrityhelp.com (confidential, third-party operated) |
| Careers and alumni | apply.deloitte.com for jobs; alumni.deloitte.com or [email protected] for alumni |
Deloitte Headquarters Location and Contact Information
Deloitte LLP, the US firm, lists its New York national office at 30 Rockefeller Plaza, 41st Floor, New York, NY 10112-0015, with a switchboard at +1 212 492 4000. Both details come straight from the firm’s own national office page. The same Rockefeller Center address is the registered headquarters for the operating subsidiaries that actually sign engagement letters — Deloitte & Touche LLP, Deloitte Consulting LLP, Deloitte Tax LLP, Deloitte Financial Advisory Services LLP, and Deloitte Transactions and Business Analytics LLP — so if a document refers to any of those entities, 30 Rock is the corporate address you want.
The global organization is a different legal animal. Deloitte Touche Tohmatsu Limited (“DTTL” or “Deloitte Global”) is a UK private company limited by guarantee, registered in England and Wales at 1 New Street Square, London EC4A 3HQ, according to Deloitte’s legal terms page. DTTL does not provide services to clients itself; it coordinates a network of legally separate member firms, of which Deloitte LLP in the United States is the largest. Keep in mind that neither address is a walk-in service location: there is no public counter at 30 Rock, and correspondence about a specific engagement should go to the partner and office handling it, which you can find through the firm’s office locator.
Phone Contacts
Deloitte publishes office switchboards rather than a central hotline. The numbers below are the only ones we could verify on deloitte.com office pages; if a number you find elsewhere is not on this list, treat it with suspicion.
- New York national office (US headquarters): +1 212 492 4000 — 30 Rockefeller Plaza, 41st Floor
- Chicago: +1 312 486 1000 — 111 S. Wacker Drive, Suite 2100, Chicago, IL 60606-4301
- Rosslyn (Arlington, VA): +1 571 882 5000 — 1919 North Lynn Street, Suite 1500, Rosslyn, VA 22209
- Hermitage (Nashville area), TN: +1 615 882 7600 — 4022 Sells Dr., Hermitage, TN 37076-2930
- Deloitte University, Westlake, TX: +1 682 388 1000 — 2501 Westlake Parkway, Westlake, TX 76262
- Ethics and integrity concerns: no public phone number is currently published on deloitte.com; use the web-based Integrity Helpline at integrityhelp.com
Contact Channels and Support
Because Deloitte sells audit, tax, consulting, and advisory services to organizations rather than products to the public, its contact channels are organized by audience. Prospective clients use the Connect with us form or the “Submit RFP” route on the same page; the firm says it will respond to inquiries that need a personal answer. Existing clients should go through their engagement team, which is faster than any general form. Journalists have a dedicated US press room that lists public-relations contacts by industry and topic.
Job seekers apply through the careers portal at apply.deloitte.com. One practical warning that Deloitte itself publishes: fraudulent job offers are sometimes made in the firm’s name, and anyone who receives a suspicious “Deloitte” offer is asked to report it through the Integrity Helpline at integrityhelp.com. Former employees can join the #ColleaguesForLife alumni network at alumni.deloitte.com or email [email protected]. For ethics matters involving any part of the organization, Deloitte’s ethics contacts page provides a report form and, for the United States, the Chief Ethics Officer’s email, [email protected].
Company Background
The firm traces its origin to April 23, 1845, when William Welch Deloitte, a London-born accountant who had spent a dozen years working for the Official Assignee in Bankruptcy of the City of London, opened his own office on Basinghall Street. He had nearly 100 clients in his first year, many of them facing bankruptcy court, and built his early reputation auditing the railway companies of Victorian Britain. Over the following 180 years a long series of mergers between British, American, and Japanese firms produced the Deloitte Touche Tohmatsu name used by the network today. Deloitte’s own history article tells the founding story in detail.
Today Deloitte describes itself as the world’s largest professional services organization. The network reported aggregate revenue of US$70.5 billion for the fiscal year ended May 31, 2025, up 4.8 percent in local currency, according to its FY2025 revenue announcement, with approximately 470,000 people in more than 150 countries and territories. The US firm alone recorded $35.7 billion in revenue in the same fiscal year, per its 2025 facts-and-figures page, and Deloitte US says it has more than 180,000 people, making it the largest professional services organization in the United States. Unlike its publicly traded clients, Deloitte has no ticker: each member firm is owned by its partners.
Leadership
Two chief executives matter, and they are often confused. Jason Girzadas has been Chief Executive Officer of Deloitte US since 2023; on August 4, 2026 the firm announced he had been reelected to a second term beginning May 30, 2027, alongside US Chair Lara Abrash. Joseph B. (Joe) Ucuzoglu is Deloitte Global CEO, a role he assumed on December 31, 2022 after serving as Deloitte US CEO from 2019; Anna Marks chairs the Deloitte Global Board of Directors. Incorporation-wise, Deloitte LLP is a Delaware limited liability partnership with its registered agent in Wilmington and its headquarters in New York. Our Delaware business search guide explains how to look up the partnership’s registration, and the New York business search guide covers its foreign-entity filing in the state where it is headquartered.
Key Office Locations
New York is the executive seat, but Deloitte US is spread across dozens of cities. Chicago, at 111 S. Wacker Drive, is one of the firm’s largest offices. Rosslyn, Virginia, directly across the Potomac from Washington, DC, is the firm’s address in the capital region, and Dallas (717 N. Harwood Street) and Hermitage, Tennessee, outside Nashville, are other sizable locations. Westlake, Texas, about 30 miles northwest of Dallas, is home to Deloitte University, the firm’s roughly 700,000-square-foot leadership and training campus, which welcomed its first programs in October 2011 and has since been expanded. Globally, the network’s coordinating entity, DTTL, is based at 1 New Street Square in London.
How to Raise a Concern About Deloitte
Start with the people who know your engagement: raise the issue in writing with your lead client service partner or engagement partner, and keep dated copies of everything. Most service disputes end here. If that fails, or if the concern is about conduct rather than quality, use the Integrity Helpline at integrityhelp.com. Deloitte describes it as a confidential, third-party-operated channel that is open to anyone — employees, clients, suppliers, or members of the public — and its Speak Up page explains how reports are routed. You can also write to the US Chief Ethics Officer at [email protected].
Because Deloitte is a registered public accounting firm, there are regulators with real teeth. For anything touching an audit of a public company, submit a tip to the Public Company Accounting Oversight Board through its tips and referrals page, by phone at 800-741-3158, or by mail to Tips and Referrals, PCAOB, 1666 K Street NW, Suite 300, Washington, DC 20006. For conduct by an individual CPA, the licensing authority is the state Board of Accountancy where that CPA is licensed; the NASBA directory lists all 55 boards. In New York, complaints go in writing to the State Education Department’s Office of Professional Discipline (1-800-442-8106 or [email protected]). Finally, the AICPA accepts ethics complaints against member CPAs by mail at 220 Leigh Farm Road, Durham, NC 27707, Attn: Professional Ethics Division. Fee or contract disputes are governed by your engagement letter, which typically specifies mediation or arbitration before litigation.
Summary
Deloitte’s US headquarters is 30 Rockefeller Plaza, 41st Floor, New York, NY 10112-0015, reachable through the national office switchboard at +1 212 492 4000, while the global parent, Deloitte Touche Tohmatsu Limited, is headquartered at 1 New Street Square, London EC4A 3HQ. There is no consumer hotline; clients go through their engagement team or the online contact form, candidates through apply.deloitte.com, and anyone with an integrity concern through integrityhelp.com, with the PCAOB and state boards of accountancy as the regulatory backstop. Looking for another company’s corporate contacts? Browse our other headquarters guides.
Frequently Asked Questions
Where is Deloitte’s headquarters located?
Deloitte LLP, the US firm, is headquartered at 30 Rockefeller Plaza, 41st Floor, New York, NY 10112-0015. The global parent, Deloitte Touche Tohmatsu Limited, is headquartered at 1 New Street Square, London EC4A 3HQ, United Kingdom.
What is Deloitte’s phone number?
Deloitte does not operate a central customer service line. The New York national office switchboard is +1 212 492 4000; other offices publish their own numbers on deloitte.com, such as Chicago at +1 312 486 1000.
Who is the CEO of Deloitte?
Jason Girzadas is CEO of Deloitte US (since 2023, reelected in August 2026 for a second term starting May 2027). Joe Ucuzoglu is Deloitte Global CEO, a role he has held since December 31, 2022.
Who owns Deloitte?
Deloitte is privately owned by its partners. Each member firm, including Deloitte LLP in the United States, is a separate legal entity owned by its own partners; Deloitte Touche Tohmatsu Limited, a UK company limited by guarantee, coordinates the network but does not own the firms.
How do I file a complaint against Deloitte?
Raise it with your engagement partner first, then use the confidential Integrity Helpline at integrityhelp.com or email [email protected]. For audit-related matters, submit a tip to the PCAOB at pcaobus.org or 800-741-3158; for an individual CPA, contact the relevant state Board of Accountancy.
Is Deloitte a public company with a stock ticker?
No. Deloitte is a private partnership network and has never been listed on a stock exchange. Its scale is reported through an annual revenue announcement: US$70.5 billion for the fiscal year ended May 31, 2025.