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- S-Well (Southend Emotional Wellbeing Service)
- School Nursing Service (Southend-on-Sea)
- Scout Group
- SET CAMHS (Southend, Essex and Thurrock Child and Adolescent Mental Health Service)
- South East Essex Type 1 Diabetes Family Group (SEET 1)
- South Essex Community Hub - Youth Hub
- Southend Careers Service (formerly Connexions)
- Southend Neighbourhood Watch
- Southend Parkour - Adult Class (16+ year olds)
- Southend SEND Team
- Southend United - Premier League Kicks Project and Canvey Kicks
- Southend YMCA Supported Housing
- Southend Youth Council
- Southend Youth Justice Service (YJS)
- Southend Youth Service Youth Clubs