Southern Mississippi Planning & Development District Share: Planning & Development District Southern Mississippi Planning & Development District Visit Website 10441 Corporate Drive Ste. 1 Gulfport, MS 39503 (228) 868-2311 (228) 868-7094 (fax) Rep Info Map Whom to Contact Allison Hawkins What's Nearby? Distance: 5 10 15 20 25 50 mi.