The Seaside Downtown Development Association is a non profit organization "Enancing the environment and economic viability of downtown Seaside, Oregon for the local community and visitors."

In addition to providing the iconic starfish lighting and lush flower baskets throughout the downtown area, SDDA annually sponsors a Fall and Spring Wine Walk, two car shows, golf tournament, dinner & auction with Seaside Kids, Inc., Halloween Happenin's, as well as a winter coupon book, downtown walking map and Shop Seaside event.