The 1946 Chatham Cup was the 19th annual nationwide knockout football competition in New Zealand.
Teams taking part in the final rounds are known to have included Wellington Marist, Metro College (Auckland), Wanganui Old Boys, St. Andrews (Manawatu), Technical Old Boys (Christchurch), and Mosgiel.
Wellington Marist's Jack Duffy was the only player to play in both the 1946 final and the 1932 final, Marist's previous Chatham Cup win.
Marist dominated the final, but it was Tech who took the lead in front of a crowd of 8000, with Cyril Thomas scoring during the first half.
Jack Hatchard levelled for Marist before the break, then took the lead early in the second half through Henry Bell.