Middlesbrough F.C. with supporters' clubs across the globe. The largest supporters' clubs include the Official Supporters' Club, the Middlesbrough Disabled Supporters' Association, Yarm Reds, Red Faction and Middlesbrough Supporters South. Middlesbrough supporters' main rivals are Sunderland (with whom they contest the Tees–Wear derby), Newcastle United (with whom they contest the Tyne–Tees derby), and Leeds United, a fact confirmed by planetfootball.com's 2004 survey. Carlisle United see Middlesbrough as their biggest rivals, but Middlesbrough supporters have not reciprocated, as they do not see Carlisle as a top three rival. The nickname "Smoggies" was first used as a derogatory term by opposing supporters; it relates
Middlesbrough W.F.C. Gemma Grainger who progressed to work with the national England Women's set-up for The Football Association as U20's assistant coach. Norton and Stockton Ancients Ladies FC are a neighbouring team who have competed in the same league as Middlesbrough WFC as recently as the 2015–16 season. Middlesbrough W.F.C. Middlesbrough Women Football Club are the women's side of Middlesbrough. Founded in 1976, they currently play their matches in the , with home games being played at Bedford Terrace, the home of Billingham Town F.C. Middlesbrough WFC also have a reserve side competing in the FA Women's Premier League Reserve Northern Division