Flagstar Bank Headquarters Address, Corporate Office Location, and Contact Details
About
Flagstar Bank, N.A. (NYSE: FLG) is one of the largest regional banks in the United States with $87.1 billion in total assets as of March 31, 2026, and 345 domestic branch locations across 10 states. The bank traces its origins to 1987 in Bloomfield Hills, Michigan as First Security Savings Bank, and later operated from its Troy, MI campus as Flagstar Bank FSB. Following NYCB’s acquisition of Flagstar Bancorp in 2022 and the operational merger completed in February 2024, Flagstar’s official registered corporate headquarters is now 102 Duffy Avenue, Hicksville, New York 11801. Joseph M. Otting — former U.S. Comptroller of the Currency installed as CEO in March 2024 — has guided the bank to profitability in Q4 2025 and Q1 2026 after two challenging restructuring years.
Quick Facts
Founded
1987 (Bloomfield Hills, Michigan)
Official Corporate HQ
102 Duffy Avenue, Hicksville, NY 11801
Legacy Michigan Banking Center
5151 Corporate Drive, Troy, MI 48098 (branch — not corporate HQ)
Industry
Regional Commercial Banking / Mortgage
Ticker: NYSE
FLG
CEO
Joseph M. Otting (Executive Chairman, President & CEO)
Total Assets (Q1 2026)
$87.1 billion
Branches
345 domestic locations in 10 states
What Brings You Here? Find the Right Contact
General customer service
Call 1-888-248-6423 for deposit accounts, online banking, debit/credit cards, and general banking.
Mortgage customer service / formal complaints
Call 833-755-2085 or mail formal complaints to Flagstar Bank, Attn: Customer Relations, PO Box 619098, Dallas, TX 75261. Federal RESPA regulations require Flagstar to acknowledge your written complaint within 5 days and respond within 30–45 days.
Troy, MI branch (in-person)
Contact the Troy banking center at (248) 312-2000 or (248) 312-5400. Hours Mon–Thu 9am–5pm, Fri 9am–6pm, Sat 9am–1pm. This is a branch location — corporate matters go to Hicksville, NY.
Investor relations
Contact IR at (516) 683-4420 or ir@flagstar.com. All investor mail to 102 Duffy Avenue, Hicksville, NY 11801.
Texas mortgage residents
Complaints go to the Department of Savings and Mortgage Lending, 2601 North Lamar, Suite 201, Austin, TX 78705. Toll-free: 1-877-276-5550.
Legal / subpoena
Serve Flagstar Bank, N.A. at 102 Duffy Avenue, Hicksville, NY 11801. Do not use the Troy, MI address — the registered entity is headquartered in New York.
Phone Directory
General Customer Service
1-888-248-6423
Mortgage Customer Service
833-755-2085
Troy, MI Branch
(248) 312-2000 / (248) 312-5400
Investor Relations (Hicksville)
(516) 683-4420 | ir@flagstar.com
Computershare (U.S./Canada)
1-866-293-6077
SWIFT Code
FLGSUS33
ABA Routing (Michigan legacy)
272471852
Corporate Headquarters Address (Official)
Flagstar Bank, N.A.
102 Duffy Avenue
Hicksville, NY 11801
Mortgage Complaints Mail
Flagstar Bank, Attn: Customer Relations
PO Box 619098, Dallas, TX 75261
Legacy Michigan Banking Center (branch only)
5151 Corporate Drive, Troy, MI 48098
How to Escalate a Complaint
- Call first: 1-888-248-6423 (general) or 833-755-2085 (mortgage). Ask for a supervisor and get a case number on every call.
- Mail a formal written complaint for mortgage issues to PO Box 619098, Dallas, TX 75261 — RESPA requires Flagstar to respond within 30–45 days.
- Send a certified letter to HQ at 102 Duffy Avenue, Hicksville, NY 11801 with your account/loan number, prior case numbers, and requested resolution.
- File with the BBB. Flagstar has 398 total complaints in the last 3 years and 103 complaints in the last 12 months listed under the Troy, MI BBB chapter.
- File with the OCC (primary federal regulator for Flagstar N.A.) at helpwithmybank.gov — OCC handles banking and lending violations by nationally chartered banks.
- File with the CFPB at consumerfinance.gov/complaint for mortgage, deposit, and consumer lending disputes.
- File with the FDIC at fdic.gov or call 1-877-275-3342 for deposit account insurance complaints.
- File with Michigan DIFS at michigan.gov/difs for complaints involving Flagstar’s Michigan branch operations.