Landmark Credit Union Banks & Credit Unions Visit Website 555 S. Executive Dr. Brookfield , WI 53005 (262) 796-4500 About Map About As a not-for-profit financial cooperative, Landmark Credit Union returns profits to our members, who enjoy better rates and lower fees on a full range of straightforward financial options. What's Nearby? Distance: 5 10 15 20 25 50 mi.