The 2006 Chatham Cup was the 79th annual nationwide knockout football competition in New Zealand. Up to the last 16 of the competition, the cup was run in three regions (northern, central, and southern), with an open draw from the quarter-finals on. In all, 137 teams took part in the competition. Note: Different sources give different numberings for the rounds of the competition. Some record five rounds prior to the quarter-finals; others note a preliminary round followed by four full rounds. The former numbering system isn used in this article.