| Jan van Breda Kolff | |
| Upright: | 0.9 |
| Fullname: | Jan Gualtherus van Breda Kolff |
| Birth Date: | 18 January 1894 |
| Death Place: | West Chatham, United States |
| Position: | Forward |
| Years1: | 1910–1913 |
| Clubs1: | HVV Den Haag |
| Nationalyears1: | 1911–1913 |
| Nationalteam1: | Netherlands |
| Nationalcaps1: | 11 |
| Nationalgoals1: | 1 |
Jan Gualtherus van Breda Kolff (18 January 1894 – 6 February 1976) was a Dutch amateur football player.[1]
Van Breda Kolff made his debut in the Netherlands national team as a player of HVV Den Haag on 2 April 1911 at the age of 17, and (as of 2014) he still holds the record as the youngest player to have ever played for "Oranje".[2] During his debut in a 3–1 win over Belgium he scored the second goal to give the Dutch a 2–0 lead.[3] This also by default made him the youngest goalscorer in the team's history. In total he played 11 international matches, including four games at the 1912 Summer Olympics where he won the bronze medal in a 9–0 win over Finland.[4] The goal he scored in his international debut was the only goal he scored in his 11 caps.[5]
Van Breda Kolff later had a career as a stockbroker in the United States. His son Butch van Breda Kolff and grandson Jan van Breda Kolff are notable American basketball coaches.