Prosperity Bank Address: 468 Coloma Rd, Port Lavaca, TX 77979 Phone: (361) 572-6541 Banks Other Businesses: Tdecu at 2318 W Main St, #A, Port Lavaca, TX 77979 TDECU at 2318 West Main Street, Port Lavaca, TX 77979 First National Bank-Prt Lavaca at 1101 State Highway 35 S, Port Lavaca, TX 77979 First Convenience Bank at 101 Calhoun Plz, Port Lavaca, TX 77979