- South Bank, London (Lambeth Bridge to London Bridge) http://www.southbanklondon.com
- South Buckinghamshire tourism http://www.southbucks.gov.uk/leisure_and_tourism/visitor_information/411.asp
- Surrey County Council http://www.surreycc.gov.uk
- Surrey tourist information http://www.visitsurrey.com/
- Sustrans http://www.sustrans.com
- Swindon Borough Council http://www.swindon.gov.uk
- Thames 21 http://www.thames21.org.uk/
- Thames Landscape Strategy - Hampton to Kew http://thames-landscape-strategy.org.uk/
- Thames Landscape Strategy - Kew to Chelsea in London http://www.thamesstrategy-kewtochelsea.org.uk/
- Thames Rivers Restoration Trust http://trrt.org.uk/ Dedicated to improving the river and its tributatires to benefit people and nature