Economic Development go Results Found: 3 Button group with nested dropdown Southern Ohio Port Authority Southern Ohio Port Authority 602 7th Street Rm 310 Portsmouth Oh 45662 (740) 355-1265 Southern Ohio Diversification Southern Ohio Diversification P.O. Box 517 Piketon OH 45661 (740) 289-2576 Portsmouth Inner City Development Cor... Portsmouth Inner City Development Corporation 1206 Waller Street Suite 1 Portsmouth OH 45662 (740) 354-6626