Harrow Sub Aqua Club
- Harrow branch of the British Sub-Aqua Club. Site has contact information for newcomers, dive list, trip reports and photographs.
- http://harrowsubaqua.org.uk/

Hatch End Tennis Club
- Club history, team fixtures and results, online newsletter, and membership information.
- http://www.hatchendtennisclub.co.uk/

Bannisters Sports Centre
- Managed on behalf of Harrow Council. Includes details of facilities, opening hours and membership.
- http://bannister.leisureconnection.co.uk

Harrow and Wealdstone Swimming Club
- Has news, calendar, results, committees, background, club shop and articles about swimming. The club caters for learn-to-swim, competitive squads and Masters swimmers. The club also swims as part of T5 London West.
- http://www.harrowswim.org/

Harrow and Wembley Outdoor Group
- Activities include walking, mountaineering, horse riding, mountain biking, cycling, rock climbing, skiing, and caving. Site features an events list, organisational information, newsletters, and photos.
- http://www.hawog.org.uk/

Harrow Petanque Club
- News, club and other events, results, socials and club history. Recent and historical photo galleries.
- http://www.harrowpetanque.fsnet.co.uk/

Pinner and Grammarians RUFC
- Includes news, fixtures, contacts and clubhouse details.
- http://www.pinner-rugby-club.co.uk/