Departments The City of Bay St. Louis follows a simple division of labor with four major departments: Administration, Public Works, Police and Fire. Within these four departments are several support divisions. The Mayor directs all employees in their specific duties to deliver service to the public with integrity, accountability and responsibility. Supporting the four major departments are Finance, Human Resources, Beautification, Municipal Court, Community Development, Cultural Affairs, Building, Zoning and Utility Services. Formal inter local agreements provide additional support to public safety. Informal partnerships with other public, semi-public groups and dedicated volunteers assist the city in reaching all of its potential in the 21st century.