Saginaw Charter Township – Limited Associate

Saginaw County 911 Communications Ctr. – Limited Associate

Saginaw-Midland Municipal Water Supply – Limited Associate

Sagola Township Area Rescue – Limited Associate

Saint Charles – Full Member

Saint Clair – Full Member

Saint Clair Housing Commission – Limited Associate

Saint Clair Shores – Full Member

Saint Ignace – Full Member

Saint Johns – Full Member

Saint Joseph – Full Member

Saint Joseph Charter Township – Limited Associate

Saint Joseph County – Limited Associate

Saint Louis – Full Member

Salem Township – Limited Associate

Saline – Full Member

Saline Area Fire Department – Limited Associate

Sand Lake – Full Member

Sands Township – Limited Associate

Saranac – Full Member

Sandusky – Full Member

Sandusky District Library – Limited Associate

Sanford – Full Member

Sanilac East Fire Authority – Limited Associate

Saranac – Full Member

Saranac Clarksville District Library – Limited Associate

Saranac Community Volunteer Fire Dept. – Limited Associate

Saranac Housing Commission – Limited Associate

Saranac Public Library – Associate

Saugatuck – Full Member

Sault Ste Marie – Full Member

Schoolcraft – Full Member

Schoolcraft Community Library – Associate

Scio Township – Full Associate

Scipio Township – Limited Associate

Scottville – Full Member

SE Oakland County Water Authority – Limited Associate

SE Oakland Resources Recovery Auth. – Limited Associate

Sebewaing – Full Member

Sebewaing Municipal Electric Light Plant – Limited Associate

Sebewaing Township – Limited Associate

Shelby – Full Member

Shelby Area District Library – Limited Associate

Shelby Township – Limited Associate

Shepherd – Full Member

Shepherd Tri-Township Fire Dept. – Limited Associate

Sheridan – Full Member

Sheridan Township – Limited Associate

Sherman Township – Limited Associate

Sherwood – Full Member

Shiawassee District Library – Limited Associate

Shiawassee Township – Limited Associate

Shoreham – Full Member

Sidney Township – Limited Associate

South Branch Township – Limited Associate

South Haven – Full Member

South Haven Housing Commission – Limited Associate

South Huron Utility Authority – Limited Associate

South Kalamazoo County Fire Authority – Limited Associate

South Lyon – Full Member

South Macomb Disposal Authority – Limited Associate

South Range – Full Member

South Rockwood – Full Member

Southeast Berrien County Landfill – Limited Associate

Southeast Macomb Sanitary District – Limited Associate

Southeast Michigan Community Alliance – Limited Associate

Southern Clinton County Mun. Utility Auth. – Limited Associate

Southern Lakes Regional Metro Parks and Recreation District – Limited Associate

Southern Links Trailway Management Council – Limited Associate

Southfield – Full Member

Southfield Township – Full Associate

Southgate – Full Member

Southwest Barry County Sewer/Water – Limited Associate

Southwest MI Regional Airport – Limited Associate

Sparta – Full Member

Sparta Fire Department – Limited Associate

Spaulding Township – Limited Associate

Spring Arbor Township – Limited Associate

Spring Lake – Full Member

Spring Lake Township – Limited Associate

Springfield – Full Member

Springport – Full Member

Springport Township – Limited Associate

St. Louis, Ithaca, Pine River Transit Authority – Limited Associate

Stambaugh Cemetery Association – Limited Associate

Standish – Full Member

Stanton – Full Member

Stanton Community Fire Association – Limited Associate

Stanton Township – Limited Associate

Stephenson – Full Member

Sterling – Full Member

Sterling Heights – Full Member

Stevensville – Full Member

Stockbridge – Full Member

Sturgis – Full Member

Sturgis Downtown Development Authority – Limited Associate

Sturgis Housing Commission – Limited Associate

Summit Township – Limited Associate

Summit Township – Limited Associate

Sunfield – Full Member

Sunfield Township – Limited Associate

Superior Charter Township – Limited Associate

Superior District Library – Limited Associate

Suttons Bay – Full Member

Swartz Creek  – Full Member

Swartz Creek Area Fire Dept. – Limited Associate

Sweetwater Township – Limited Associate

Sylvan Lake – Full Member