Federal Agencies in MS Federal Agencies operating within MS. Federal Agencies in MS Bureau of ATF Gulfport, Harrison County Bureau of ATF Jackson, Hinds County Bureau of ATF Oxford, Lafayette County Federal Bureau of Investigation Jackson, Hinds County Federal Emergency Mgmt Agency Pearl, Rankin County Homeland Security Investigations (HSI) Gulfport, Harrison County Internal Revenue Service Jackson, Hinds County US Marshals Service Jackson, Hinds County US Marshals Service Oxford, Lafayette County US Secret Service Jackson, Hinds County
