The following is a list of all team-to-team transactions that have occurred in the National Hockey League during the 1976–77 NHL season. It lists what team each player has been traded to, signed by, or claimed by, and for which player(s) or draft pick(s), if applicable.
| May 26, 1976 | To Boston Bruins Rick Middleton | To New York Rangers Ken Hodge | |
| May 28, 1976 | To Los Angeles Kings John Campbell | To New York Rangers Mark Heaslip |
| June 12, 1976 | To Montreal Canadiens 3rd-rd pick - 1977 Amateur Draft (# 49 - Moe Robinson) 1st-rd pick - 1978 Amateur Draft (# 8 - Dan Geoffrion) | To Los Angeles Kings Glenn Goldup 3rd-rd pick - 1978 Amateur Draft (DET - # 53 - Doug Derkson)1 |
| August 11, 1976 | To Montreal Canadiens 3rd-rd pick - 1978 Amateur Draft (# 42 - Richard David) | To Pittsburgh Penguins Don Awrey | |
| August 23, 1976 | To Minnesota North Stars Gary Smith | To Vancouver Canucks Cesare Maniago |
| September 12, 1976 | To Vancouver Canucks 5th-rd pick - 1978 Amateur Draft (# 73 - Tim Thomlison) | To Colorado Rockies 4th-rd pick - 1977 Amateur Draft (# 56 - Dave Morrow) | |
| September 13, 1976 | To Montreal Canadiens cash Canadiens option to swap 1st-rd picks - 1980 Entry Draft (# 1 - Doug Wickenheiser)1 | To Colorado Rockies Ron Andruff Sean Shanahan | |
| September 15, 1976 | To Toronto Maple Leafs cash | To Colorado Rockies Doug Favell | |
| September 27, 1976 | To Toronto Maple Leafs Blair MacKasey | To Washington Capitals cash | |
| September 28, 1976 | To Toronto Maple Leafs 2nd-rd pick - 1977 Amateur Draft (# 24 - Bob Gladney) | To Chicago Black Hawks rights to Jim Harrison | |
| September 29, 1976 | To Los Angeles Kings Dave Schultz | To Philadelphia Flyers 4th-rd pick - 1977 Amateur Draft (# 67 - Yves Guillemette) 2nd-rd pick - 1978 Amateur Draft (COL - # 27 - Merlin Malinowski)2 |
| October 6, 1976 | To Vancouver Canucks Dave Fortier Ralph Stewart | To New York Islanders cash | |
| October 8, 1976 | To Pittsburgh Penguins Dunc Wilson | To New York Rangers 4th-rd pick - 1978 Amateur Draft (# 59 - Dave Silk) | |
| October 18, 1976 | To Los Angeles Kings 5th-rd pick - 1977 Amateur Draft (# 84 - Julian Baretta) | To Pittsburgh Penguins Mike Corrigan |
| November 11, 1976 | To Minnesota North Stars Nick Beverley Bill Fairbairn | To New York Rangers Bill Goldsworthy | |
| November 24, 1976 | To Montreal Canadiens 3rd-rd pick - 1979 Entry Draft (# 43 - Craig Levie) | To Colorado Rockies John Van Boxmeer | |
| November 24, 1976 | To Washington Capitals cash | To Philadelphia Flyers Harvey Bennett Jr. | |
| November 30, 1976 | To Detroit Red Wings Greg Joly | To Washington Capitals Bryan Watson |
| December 2, 1976 | To Vancouver Canucks Larry Carriere Hilliard Graves | To Atlanta Flames John Gould 2nd-rd pick - 1977 Amateur Draft (# 31 - Brian Hill) | |
| December 4, 1976 | To Washington Capitals Bill Collins | To Philadelphia Flyers cash | |
| December 20, 1976 | To Boston Bruins Rick Smith | To St. Louis Blues Joe Zanussi |
| January 20, 1977 | To Vancouver Canucks Larry Goodenough Jack McIlhargey | To Philadelphia Flyers Bob Dailey | |
| January 22, 1977 | To Cleveland Barons Gary Edwards Juha Widing | To Los Angeles Kings Jim Moxey Gary Simmons |
| February 11, 1977 | To Colorado Rockies rights to Danny Gruen | To Detroit Red Wings cash | |
| February 17, 1977 | To Detroit Red Wings Steve Coates Dave Kelly Terry Murray Bob Ritchie | To Philadelphia Flyers Mike Korney Rick Lapointe | |
| February 18, 1977 | To Vancouver Canucks Derek Sanderson | To St. Louis Blues cash | |
| February 25, 1977 | To Montreal Canadiens cash future considerations | To Detroit Red Wings rights to Marty Howe |
| March 3, 1977 | To Buffalo Sabres cash | To Washington Capitals Roger Crozier | |
| March 8, 1977 | To Toronto Maple Leafs Tracy Pratt | To Colorado Rockies 3rd-rd pick - 1977 Amateur Draft (# 47 - Randy Pierce) |