Kingston Rugby Football Club
- Club information, history, fixtures, results, membership information and a photo gallery.
- http://server16.web-mania.com/users/kingtonl/

Keighley Crusaders Rugby Union Club
- The official site featuring results, tables, guest book and player profiles.
- http://users.tinyworld.co.uk/dpullen/

Knaresborough RUFC
- News, club history, match reports, fixtures, player profiles and list of social events.
- http://www.krufc.co.uk/

Kilburn Cosmos Rugby Football Club
- Fixtures, results, match reports and a photo gallery.
- http://www.kilburncosmos.co.uk/

King's College Hospital Rugby Football Club
- Club information, results, fixtures, calendar of events and news.
- http://www.kchrfc.co.uk/

Kendal Rugby Union Football Club
- The official site for the club who play in the National League 3 North. Club information, teams, results, fixtures, tables, and contacts.
- http://kendal-rugby.com/

Kenilworth Rugby Football Club
- The official site with history, fixtures, news, statistics and match reports.
- http://www.kenilworthrugby.co.uk/

Kidderminster Carolians Rugby Football Club
- Includes fixtures, history, photographs and archives.
- http://www.kcrfc.org.uk/

KCS Old Boys RFC
- Includes club information, fixtures, tours and tables.
- http://www.kings.org.uk/

Kings Cross Steelers Rugby Football Club
- Offering gays and lesbians the chance to play competitive rugby.
- http://www.kxsrfc.com/