The Union County Sheriff's Office is composed of a chief deputy, lieutenants, sergeants, sworn deputies, civilian personnel, communications officers, and court services deputies. The Sheriff's office has six (6) separate divisions: Administration, Communications, Court Services, Investigations, Patrol, and Support Services (Community Outreach).
- The Administrative Division is supervised by a Director whose primary responsibility is to provide general management direction and control of the Administrative Division. The Administrative Division's primary role is to establish, facilitate and monitor the agency's budgets and accounts. The Administrative Division consists of an Accounts Payable Clerk and an Administrative Assistant. The Administrative Division Director will also oversee all special duty requests, quatermaster, grant applications, quarterly and yearly reports, quarterly newsletters.
- Communications Division is commanded by a Director whose primary responsibility is to provide general management direction and control of the Communications Division and County 9-1-1 System. The Communications Division consist of 9-1-1 Operators that serve as Police and Fire Communications Officers.
- The Court Services Division is commanded by a Director whose primary responsibility is to provide general management, direction and control of the Court Services Division. The Court Services Director's primary goals are, overseeing the security of the Justice Center and Court House, Civil Process, transportation of prisoners, the keeper of records, Sexual Offender Registration and the issuance of revocation of Concealed Carry Licenses.
- The Investigations Division is commanded by a Lieutenant, whose primary responsibility is to provide general management direction and control for the Investigations Division. The Investigations Division consists of the Investigations Division, Crime Analysis Unit, Special Operations Bureau (SRT, HNT, SUAS) and the Multi-Agency Drug Enforcement (M.A.D.E.) Task Force.
- The Patrol Division is commanded by the Lieutenant, whose primary responsibility is to provide general management direction and control for the Patrol Division. The Patrol Division consists of all uniformed patrol deputies, K-9 operations, the County Dog Warden and the multi-county crash investigations team.
- The Support Services Division (Community Outreach) is commanded by a Lieutenant whose primary responsibility is to provide general management direction and control of the Support Services Division. The Support Services Division consists of the Community Education Bureau, the Special Deputy Bureau and Volunteers in Police Service (VIPS) and coordinating all agency training.