About United Marine Underwriters
United Marine Underwriters, based in La Grange, Kentucky, is a specialty marine insurance program that has operated since 1990 as part of Troutman & Associates, Inc. The company markets, quotes, binds, and services boat, yacht, and personal watercraft insurance policies, with coverage placed through partner insurance carriers, working with independent agents nationwide. It covers a wide range of vessel types, including powerboats, sailboats, houseboats, and personal watercraft, along with related property such as boat trailers and motors.
Lines of Business
Getting a United Marine Underwriters quote in Florida
Tell us what you need covered and we'll quote United Marine Underwriters alongside our other carriers, then walk you through the differences in price and coverage. United Marine Underwriters makes the final underwriting and pricing decision, and coverage can't be bound or changed through this website.
United Marine Underwriters questions
Can Magnuson Insurance quote United Marine Underwriters?
Yes. Magnuson Insurance, an independent agency in Lakeland, Florida, can quote United Marine Underwriters for boat and personal watercraft coverage and compare it side by side with the other carriers we work with. United Marine Underwriters makes the final underwriting and pricing decision, and coverage can't be bound or changed through this website.
What is United Marine Underwriters's claims phone number?
Report a claim to United Marine Underwriters at 800-477-7140. If you're a Magnuson Insurance customer, you can also call us at (863) 606-5147 during office hours (Monday to Friday, 9:00am to 4:30pm) and we'll help you report it and follow up.
How do I pay my United Marine Underwriters bill?
United Marine Underwriters bills its policyholders directly, so pay through United Marine Underwriters's online payment page (linked on this page) or the phone number on your bill. Magnuson Insurance's own Make a Payment page is only for invoices the agency sends you, such as broker fees.
Florida insurance guides
Magnuson Insurance is an independent agency licensed by the Florida Department of Financial Services (agency license L104700). United Marine Underwriters's name and logo are its trademarks. Claims numbers and links are United Marine Underwriters's own; your policy documents have the final word. Last updated October 7, 2026.