Sumter County Sheriff's Office (Florida)  The Sumter County Sheriff's Office (SCSO) is the chief law enforcement agency for unincorporated areas of Sumter County, Florida, United States. The current sheriff is William O. Farmer, Jr.. The Sumter County Sheriff’s Office is accredited by the Commission for Florida Law Enforcement Accreditation, Inc. and recognized by the Commission on Accreditation for Law Enforcement Agencies.