Most games played by all teams, one playoff year:

92 - 1991. There were 51 DSF, 24 DF, 11 CF and 6 F games.
90 - 1994. There were 48 CQF, 23 CSF, 12 CF and 7 F games.
90 - 2002. There were 47 CQF, 25 CSF, 13 CF and 5 F games.

Most games played, one team, one playoff year:

26 - Philadelphia Flyers, 1987. Won 4-2 against NY Rangers, DF 4-3 against NY Islanders, CF 4-2 against Montreal, and lost F 4-3 against Edmonton.
25 - New Jersey Devils, 2001. Won CQD 4-2 vs Carolina, CSF 4-3 vs Toronto, CF 4-1 vs Pittsburgh, lost F 4-3 vs Colorado
24 - Pittsburgh Penguins, 1991. Won DSF 4-3 against New Jersey, DF 4-1 against Washington, CF 4-2 against Boston, and F 4-2 against Minnesota.
24 - Los Angeles Kings, 1993. Won DSF 4-2 against Calgary, DF 4-2 against Vancouver, CF 4-3 against Toronto, and lost 4-1 against Montreal.
24 - Vancouver Canucks, 1994. Won CQF 4-3 against Calgary, CSF 4-1 against Dallas, CF 4-1 against Toronto, and lost F 4-3 against NY Rangers.
24 - New Jersey Devils, 2003, Won CQF 4-1 vs Boston, CSF 4-1 vs Tampa Bay, CF 4-3 vs Ottawa, and F 4-3 vs Anaheim

Most Stanley Cup Championships:

23 - Montreal Canadiens (1924-30-31-44-46-53-56-57-58-59-60-65-66-68-69-71-73-76-77-78-79-86-93)
13 - Toronto Maple Leafs (1918-22-32-42-45-47-48-49-51-62-63-64-67)
10 - Detroit Red Wings (1936-37-43-50-52-54-55-97-98-02)

Most consecutive Stanley Cup championships:

5 - Montreal Canadiens, (56-57-58-59-60)
4 - Montreal Canadiens, (76-77-78-79)
4- NY Islanders, (80-81-82-83)

Most final series appearances:

32 - Montreal Canadiens in 84 year history
22 - Detroit Red Wings in 74 year history
21 - Toronto Maple Leafs in 84 year history

Most consecutive final series appearances:

10 - Montreal Canadiens, (1951-60, inclusive)
5 - Montreal Canadiens, (1965-69, inclusive)
–– - NY Islanders, (1990-84, inclusive)

Most years in playoffs:

73 - Montreal Canadiens in 86year history
63 - Toronto Maple Leafs in 86 year history
61 - Boston Bruins in 79 year history

Most consecutive appearances in playoffs:

29 - Boston Bruins, (1968-96, inclusive)
28 - Chicago Blackhawks, (1970-97, inclusive)
24 - Montreal Canadiens, (1971-94, inclusive)
24 - St. Louis Blues, (1980-2003, inclusive)
21 - Montreal Canadiens, (1949-69, inclusive)
 

Most home wins, one team, one playoff year:

12 - New Jersey Devils, 2003 in 13 home-ice games.
11 - Edmonton Oilers, 1988 in 11 home-ice games.
10 - Edmonton Oilers, 1985 in 10 home-ice games.
– - Montreal Canadiens, 1986 in 11 home-ice games.
– - Montreal Canadiens, 1993 in 11 home-ice games.

Most road wins, one team, one playoff year:

10 - New Jersey Devils, 1995. Won three at Boston in CQF, two at Pittsburgh in CSF, three at   Philadelphia in CF, and two at Detroit in F series.
— - New Jersey Devils, 2000. Won two at Florida in CQF, two at Toronto in CSF, three at Philadelphia in CF, and three at Dallas in F series.

8 - NY Islanders, 1980. Won two at Los Angeles in PR, three at Boston in QF, two at Buffalo in SF, and one at Philadelphia in F series.
— - Philadelphia Flyers, 1987. Won two at NY Rangers in DSF, two at NY Islanders in DF, three at Montreal in CF, and one at Edmonton in F series.
— - Edmonton Oilers, 1990. Won one at Winnipeg in DSF, two at Los Angeles in DF, two at Chicago in CF and three at Boston in F series.
— - Pittsburgh Penguins, 1992. Won two at Washington in DSF, two at NY Rangers in DF, two at Boston in CF, and two at Chicago in F series.
— - Vancouver Canucks, 1994. Won three at Calgary in CQF, two at Dallas in CSF, one at Toronto in CF, and two at NY Rangers in F series.
— - Colorado Avalanche, 1996. Won two at Vancouver in CQF, two at Chicago in CSF, two at Detroit in CF, and two at Florida in F series.
— - Detroit Red Wings, 1998. Won two at Phoenix in CQF, three at St. Louis in CSF, one at Dallas in CF, and two at Washington in F series.
— - Colorado Avalanche, 1999. Won three at San Jose in CQF; won three at Detroit in CSF; and won two at Dallas in CF
     - New Jersey Devils, 2001. Won two at Carolina in CQF, two at Toronto in CSF, two at Phittsburgh in CF, and two at Colorado in F series
    - Detroit Red Wings 2002, Won 3 at Vancouver in CQF, 1 at St Louis in CSF, 2 at Colorado in CF, and 2 at Carolina in F series.

Most road wins, all teams, one playoff season:

46 - 1987, of 87 games played, road teams won 46 (22 DSF, 14 DF, 8 CF and 2 Stanley Cup final).

Most overtime wins, one team, one playoff year:

10 - Montreal Canadiens, 1993. Two against Quebec in the DSF; three against Buffalo in the DF; two against NY Islanders in the CF; and three against Los Angeles in the F. Montreal played 20 games.
7- Carolina Hurricanes, 2002. Two against New Jersey in CQF, 1 against Montreal in CSF, 3 against Toronto in CF, and 1 against Detroit in F series. Played 23 games.
7 - Anaheim 2003. Won two vs Detroit in CFQ, two vs Dallas in CSF, one vs Minnesota in CF, two vs New Jersey in F

Most overtime wins at home, one team, one playoff year:

4 - St. Louis Blues, 1968. Won one vs. Philadelphia in QF and three vs. Minnesota in SF.
   - Montreal Canadiens, 1993. Won one vs Quebec in DSF, one vs. Buffalo in DF, one vs. NY Islanders in CF and one vs. Los Angeles in F series.

Most overtime wins on the road, one team, one playoff year:

6 - Montreal Canadiens, 1993. Won one vs. Quebec in DSF, two vs. Buffalo in DF, one vs. NY Islanders in CF, and two vs. Los Angeles in F series.

Most losses, one team, one playoff year:

11 - Philadelphia Flyers, 1987. Lost two vs. NY Rangers in DSF;
——three vs. NY Islanders in DF; two vs. Montreal in CF; and four
——vs. Edmonton in F series.

Most home losses, one team, one playoff year:

6 - Philadelphia Flyers, 1987. Lost one vs. NY Rangers in DSF;
two vs. NY Islanders in DF; two vs. Montreal in CF; and one vs.
Edmonton in F series.
- Washington Capitals, 1998. Lost 2 vs. Boston in CQF; two
vs. Buffalo in CF; and two vs. Detroit in F series.
- Colorado Avalanche, 1999. Lost 2 vs. San Jose in CQF; two
vs. Detroit in CSF; and two vs. Dallas in CF series.
- New Jersey Devils, 2001. Lost one vs.Carolina in CQF; two
vs. Toronto in CSF; one vs Pittsburgh in CF series and two vs
Colorado in the F series
- Minnesota Wild, 2003. Lost 2 vs Colorado in CFQ, two vs Vancouver in CSF, two vs Anaheim in CF

Most road losses, one team, one playoff year:

6 - St. Louis Blues, 1968. Lost two at Philadelphia in QF; two at
——Minnesota in SF; and two at Montreal in F series.
– - St. Louis Blues, 1970. Lost two at Minnesota in QF; two at
——Pittsburgh in SF; and two at Boston in F series.
– - NY Islanders, 1984. Lost one at NY Rangers in DSF; two at
——Montreal in CF; and three in Edmonton in F series.
– - LA Kings, 1993. Lost one at Calgary in DSF; one at Vancouver
——in DF; two at Toronto in CF; and two at Montreal in F series.

Most overtime losses, one team, one playoff year:

4 - Montreal Canadiens, 1951. Lost four vs. Toronto in F series.
- St. Louis Blues, 1968. Lost one vs. Philadelphia in QF;
one vs. Minnesota in SF; and two vs. Montreal in F series.
- LA Kings , 1991. Lost one vs. Vancouver in DSF; and three vs.Edmonton in DF series.
- LA Kings , 1993. Lost one vs. Toronto in CF; and three vs.Montreal in F series.
- Philadelphia Flyers , 1996. Lost two vs. Tampa Bay in CQF;and two vs. Florida in CSF series.
-Dallas Stars 1999.Lost 2 to St Louis in CSF, 1 vs Colorado inCF, and 1 vs Buffalo in F series.
-Detroit Red Wings 2002. Lost 1 to Vancouver inCQF, 2 vs Colorado inCF, and 1 to Carolina in F series.
-New Jersey Devils 2003. Lost 2 vs Ottawa in CF, two vs Anaheim in F.

Most overtime losses at home, one team, one playoff year:

4 - Detroit Red Wings, 2002. Lost 1 to Vancouver inCQF, 2 vs Colorado inCF, and 1 to Carolina in F series.

Most overtime losses on the road, one team, one playoff year:

3 - LA Kings, 1991. Lost one at Vancouver in DSF; and two at
Edmonton in DF series.
- St. Louis Blues, 1996. Lost two at Toronto in CQF; and
one at Detroit in CSF series.
- Dallas Stars, 1999. Lost two at St. Louis in CSF; and
one at Colorado in CF series.
- New Jersey Devils 2003. Lost one vs Ottawa in CF, two vs Anaheim in F

Longest playoff winning streak:

14 - Pittsburgh Penguins. Streak started May 9, 1992, at Pittsburgh
——with a 5-4 win in fourth game of a DF series against NY Rangers,
——won by Pittsburgh 4-2. Continued with a four-game sweep over
——Boston in the 1992 CF and a four-game win over Chicago in the
——1992 F. Pittsburgh then won the first three games of the 1993
——DSF vs. New Jersey. New Jersey ended the streak Apr. 25, 1993,
——at New Jersey with a 4-1 win.
12 - Edmonton Oilers. Streak began May 15, 1984 at Edmonton with a
——7-2 win over NY Islanders in 3rd game of F series, and ended
——May 9, 1985 when Chicago defeated Edmonton 5-2 at Chicago.
—— Included in the streak were three wins over the NY Islanders,
——in 1984, three over Los Angeles,four over Winnipeg and two
——over Chicago, all in 1985.

Most consecutive wins, one team, one playoff year:

11 - Chicago Blackhawks in 1992. Chicago won last three games of
——best-of-seven DSF against St. Louis to win series 4-2 and then
——defeated Detroit 4-0 in best-of-seven DF and Edmonton 4-0 in
——best-of-seven CF.
– - Pittsburgh Penguins in 1992. Pittsburgh won last three games of
——best-of-seven DF against NY Rangers to win series 4-2 and then
——defeated Boston 4-0 in best-of-seven CF and Chicago 4-0 in
——best-of-seven F.
– - Montreal Canadiens in 1993. Montreal won last four games of
——best-of-seven DSF against Quebec to win series 4-2, defeated
——Buffalo 4-0 in best-of-seven DF and won first three games of
——CF against NY Islanders.

Longest playoff losing streak:

16 games - Chicago Blackhawks. Streak started in 1975 QF against
——Buffalo when Chicago lost last two games. Then Chicago
——lost four games to Montreal in 1976 QF, two games to
——NY Islanders in 1977 PR, four games to Boston in 1978
——QF and four games to NY Islanders in 1979 QF. Streak
——ended on April 8, 1980 when Chicago defeated St. Louis
——3-2 in the opening game of their 1980 PR series.

14 games - Los Angeles Kings. Streak started when the Kings lost
——four consecutive games in 1993 Stanley Cup Finals against
——Montreal. The Kings failed to qualify for the playoffs
——for the last four years. Los Angeles lost four straight
——games to St. Louis in the 1998 CQF and failed to qualify
——for the 1999 playoffs. They were defeated in four
——straight games by Detroit in the 2000 CQF series. Defeated Detroit 2-1 on April 15, 2001 to end streak

Most goals, one team, one playoff series:

44 - Edmonton Oilers in 1985 CF. Edmonton won best-of-seven series
——4-2, outscoring Chicago 44-25.
35 - Edmonton Oilers in 1984 DF. Edmonton won best-of-seven series
——4-1, outscoring Calgary 35-13.
— - Calgary Flames in 1995 CQF. Calgary lost best-of-seven series
——4-3, outscoring San Jose 35-26.

Most goals, one team, two-game series:

11 - Buffalo Sabres in 1977 PR. Buffalo won best-of-three series
——2-0, outscoring Minnesota 11-3.
– - Toronto Maple Leafs in 1978 PR. Toronto won best-of-three
——series 2-0, outscoring Los Angeles 11-3.
10 - Boston Bruins in 1927 QF. Boston won two-game total goal series
——10-5.

Most goals, one team, three-game series:

23 - Chicago Blackhawks in 1985 DSF. Chicago won best-of-five
——series 3-0, outscoring Detroit 23-8.
20 - Minnesota North Stars in 1981 PR. Minnesota won best-of-five
——series 3-0, outscoring Boston 20-13.
— - NY Islanders in 1981 PR. New York won best-of-five series 3-0,
——outscoring Toronto 20-4

Most goals, one team, four-game series:

28 - Boston Bruins in 1972 SF. Boston won best-of-seven series 4-0,
——outscoring St. Louis 28-8.

Most goals, one team, five-game series:

35 - Edmonton Oilers in 1983 DF. Edmonton won best-of-seven series
——4-1, outscoring Chicago 35-13.
32 - Edmonton Oilers in 1987 DSF. Edmonton won best-of-seven series
——4-1, outscoring Los Angeles 32-20.
28 - NY Rangers in 1979 QF. NY Rangers won best-of-seven series 4-1,
——outscoring Philadelphia 28-8.
27 - Philadelphia Flyers in 1980 SF. Philadelphia won best-of-seven
——series 4-1, outscoring Minnesota 27-14.
— - LA Kings in 1982 DSF. Los Angeles won best-of-five series
——3-2, outscoring Edmonton 27-23.

Most goals, one team, six-games series:

44 - Edmonton Oilers in 1985 CF, Edmonton won best-of-seven series
——4-2, outscoring Chicago 44-25.
33 - Chicago Blackhawks in 1985 DF. Chicago won best-of-seven series
——4-2, outscoring Minnesota 33-29.
— - Montreal Canadiens in 1973 F. Montreal won best-of-seven series
——4-2, outscoring Chicago 33-23.
— - LA Kings in 1993 DSF. Los Angeles won best-of-seven series
——4-2, outscoring Calgary 33-28.

Most goals, one team, seven-game series:

35 - Calgary Flames in 1995 CQF. Calgary lost best-of-seven series
——3-4, outscoring San Jose 35-26.
33 - Philadelphia Flyers in 1976 QF. Philadelphia won best-of-seven
——series 4-3, outscoring Toronto 33-23.
— - Boston Bruins in 1983 DF. Boston won best-of-seven series 4-3,
——outscoring Buffalo 33-23.
— - Edmonton Oilers in 1984 DF. Edmonton won best-of-seven series
——4-3, outscoring Calgary 33-27.

Fewest goals, one team, two-game series:

0 - NY Americans in 1929 SF. Lost two-game total-game series
——1-0 against NY Rangers.
– - Chicago Blackhawks in 1935 SF. Lost two-game total-game series
——1-0 against Mtl. Maroons.
– - Mtl. Maroons in 1937 SF. Lost best-of-three series 2-0 to
——NY Rangers while being outscored 5-0.
– - NY Americans in 1939 QF. Lost best-of-three series 2-0 to
——Toronto while being outscored 6-0.

Fewest goals, one team, three-game series:

1 - Mtl. Maroons in 1936 SF. Lost best-of-five series 3-0 to Detroit
——while being outscored 6-1.

Fewest goals, one team, four-game series:

1 - Minnesota Wild in 2003, Minnesota lost best of seven series 4-0, outscored by Anaheim 9-1.
2 - Boston Bruins in 1935 SF. Toronto won best-of-five series 3-1,
outscoring Boston 7-2.
- Montreal Canadiens in 1952 F. Detroit won best-of-seven series
4-0, outscoring Montreal 11-2.

Fewest goals, one team, five-game series:

2 - Philadelphia Flyers, 2002. Ottawa won series 4-1, outscoring Philadelphia 11-2.

Fewest goals, one team, six-game series:

5 - Boston Bruins in 1951 SF. Toronto won best-of-seven series 4-1
——with 1 tie, outscoring Boston 17-5.

Fewest goals, one team, seven-game series:

9 - Toronto Maple Leafs in 1945 F. Toronto won best-of-seven series
——4-3, teams tied in scoring 9-9.
– - Detroit Red Wings in 1945 F. Toronto won best-of-seven series
——4-3, teams tied in scoring 9-9.