Kristoffer Tonnessen (born 1 October 1997) is a Norwegian football defender who plays for Start.
He made his league debut for Jerv in the 2013 3. divisjon, and took part in successive promotions to the 2016 1. divisjon. At the end of the season, Jerv was only minutes away from yet another promotion, but ultimately lost the decisive playoff match. The next year, Tonnessen made his debut for Norway U21. In the summer of 2019 he went to Start, for whom he made his first-tier debut in June 2020 against Stromsgodset.
Fiorentina 
Udinese 
Benfica 
Estoril 
Inter 
Como 
Manchester City 
Everton 
Chelsea 
Fulham 
Nottingham Forest 
Tottenham 
Celtic 
Motherwell 
Wolverhampton 
Manchester Utd 
ST Mirren 
Rangers 
Sampdoria 
Carrarese 
Liverpool 
Leicester 
Arsenal 
Ipswich 
Cagliari 
Lazio 
Atalanta 
FC Porto 
Boavista 
Torino 
Napoli 
Venezia 
ST Johnstone 
Juventus 
West Ham 
Pisa 
AC Milan 
Roma 
Sporting CP 
Newcastle 
Brentford