- A: A to Z of records
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- Samantha Boyd School of Dance
- Saturday Storyrhymes at Westcliff Library
- Scouts, Beavers and Cubs - 1st Prittlewell
- Scouts, Beavers and Cubs - 1st Shoeburyness
- Scouts, Beavers and Cubs - 2nd Prittlewell (St. Lukes)
- Scouts, Beavers and Cubs - 2nd Southchurch
- Scouts, Beavers and Cubs - 2nd Southend
- Scouts, Beavers and Cubs - 3rd Southchurch
- Sea Cadets Southend
- Shoeburyness Leisure Centre
- Shoeburyness Library
- Sing and Sign (throughout The City of Southend-on-Sea))
- Singer Stage School
- Singing and Toddling at St. Mark's Church
- Singing and Toddling at The Haven Community Hub
- Singing and Toddling at Trinity Methodist Church
- Skate Parks in Southend
- Songs & Smiles
- South Essex Community Hub - Youth Hub
- Southchurch Hall Museum and Gardens
- Southchurch Library
- Southchurch Park
- Southend Central Museum
- Southend Choirs
- Southend Golf Club Cadets (Belfairs)
- Southend Gymnastics Centre
- Southend Lawn Tennis Club
- Southend Leisure and Tennis Centre
- Southend Parks Tennis Programme
- Southend Photographic Society
- Southend Pier
- Southend Planetarium
- Southend Theatres Community and Education Department
- Southend United Football Club
- Southend YMCA Youth Clubs
- Southend Youth Council
- Southend Youth Service Youth Clubs
- Southend-on-Sea Boys Choir
- Southend-on-Sea Girls Choir
- Southend-on-Sea Sealife Adventure
- Southend-on-Sea Swimming Club
- Sparklers Toddler Group (Christ Church)
- SS Athletics
- St Andrew's Tiddlers Parent and Toddler Group
- Sue Shaws Swim School
- Swimming Tales