United States Postal Service 401 Trott Ave SWWillmar, MN, 56201 View Phone 800-275-8777 Alt: 320-235-2472 Fax: 320-235-7942 Toll Free: 800-275-8777 401 Trott Ave SWWillmar, MN 56201 View Website Experience & Reliability About Connect with this Business: Send to My Email Send to My Phone Print this Page