This is a list of teams that once played in the National Hockey League but no longer exist. This includes franchises which have relocated to different cities. The years of operation only reflect the time in which that team was in the NHL; it does not take into account any time in which the franchise operated in another league (such as the World Hockey Association).
Defunct teams before the Original Six Era
| Team | Seasons | Relocated to |
| Montreal Wanderers | 1917-1918 | |
| Ottawa Senators (original era) |
1917-1934 | St. Louis Eagles |
| Quebec Bulldogs | 1919-1920 | Hamilton Tigers |
| Hamilton Tigers | 1920-1925 | New York Americans |
| Montreal Maroons | 1924-1938 | |
| New York Americans | 1925-1942 | |
| Pittsburgh Pirates | 1925-1930 | Philadelphia Quakers |
| Philadelphia Quakers | 1930-1931 | |
| St. Louis Eagles | 1934-1935 |
Relocated teams after 1967 expansion
| Team | Seasons | Relocated to |
| California Golden Seals | 1967-1976 | Cleveland Barons |
| Kansas City Scouts | 1974-1976 | Colorado Rockies |
| Cleveland Barons | 1976-1978 | merged with Minnesota North Stars |
| Atlanta Flames | 1972-1980 | Calgary Flames |
| Colorado Rockies | 1976-1982 | New Jersey Devils |
| Minnesota North Stars | 1967-1993 | Dallas Stars |
| Quebec Nordiques | 1979-1995 | Colorado Avalanche |
| Winnipeg Jets | 1979-1996 | Phoenix Coyotes |
| Hartford Whalers | 1979-1997 | Carolina Hurricanes |
| Relocated and defunct NHL teams | |
|---|---|
| Relocated (still active) |
Atlanta Flames · Colorado Rockies · Hartford Whalers · Kansas City Scouts · Minnesota North Stars · Quebec Nordiques · Winnipeg Jets |
| Defunct | California/Oakland (Golden) Seals · Cleveland Barons · Hamilton Tigers · Montreal Maroons · Montreal Wanderers · New York/Brooklyn Americans · Ottawa Senators (original) · Philadelphia Quakers · Pittsburgh Pirates · Quebec Bulldogs · St. Louis Eagles |
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