Mississippi Development Authority Share: Government/State Mississippi Development Authority Visit Website 501 North West Street Jackson, MS 39205 (601) 359-6699 (601) 359-3613 (fax) Rep Info Map Whom to Contact Mrs. Kay Troxler Executive Assistant 501 North West Street Jackson, MS 39201 Phone: (601) 359-6699 Fax: (601) 359-2832 Send an Email What's Nearby? Distance: 5 10 15 20 25 50 mi.