Knattspyrnufélag Breiðholts (Icelandic pronunciation: [ˈkʰnahtˌspɪ(r)tnʏˌfjɛːˌlaːɣ ˈpreiðˌhɔl̥(t)s], lit.'Breiðholt Football Club'), abbreviated as KB, is an Icelandic football club based in the Breiðholt area of the capital, Reykjavík. KB is used as reserve team for Leiknir Reykjavík and does not run a youth setup. It was founded in 2007.

KB Breidholt is a prominent soccer team based in the vibrant district of Breidholt, Reykjavik, Iceland. Established in 1998, the club has quickly become a significant part of the local sports community, fostering talent and promoting the love of soccer among players of all ages.

The team's colors, often represented in their kits, reflect the spirit and resilience of Icelandic culture. KB Breidholt competes in various leagues and tournaments, showcasing a commitment to developing both competitive and recreational soccer. The club emphasizes youth development, providing training programs that nurture young athletes and instill a strong sense of teamwork and sportsmanship.

With a dedicated fan base and a focus on community engagement, KB Breidholt not only aims for success on the field but also strives to be a positive force in the Breidholt area. The team's home matches are a celebration of local pride, drawing supporters who come together to cheer for their players and enjoy the thrilling atmosphere of Icelandic soccer. As KB Breidholt continues to grow, it remains a beacon of hope and ambition for aspiring soccer players in the region.