Tri-State Expo in Lebanon, Maine   is a  30,000 square foot Exposition Center with over 10 acres of parking. A perfect venue for trade shows, concerts, conventions, cultural & political  events, flower shows, sporting shows or any type of social function! Tri-State Expo Center is easily accessible from the lakes regions of New Hampshire and Maine as well as the seacoast areas of both states. With no other major facility in our area, Tri-State Expo Center provides a much needed venue opportunity for event planners and trade show organizers.