Reigning Last New York Tri-State Area Team to Win a World Championship

October 14, 1905 to October 15, 1923: Giants (baseball version).

October 15, 1923 to December 11, 1927: Yankees.

December 11, 1927 to April 14, 1928: Giants (football version).

April 14 to October 9, 1928: Rangers.

October 9, 1928 to April 13, 1933: Yankees.

April 13 to October 7, 1933: Rangers.

October 7, 1933 to December 9, 1934: Giants (baseball version).

December 9, 1934 to October 6, 1936: Giants (football version).

October 6, 1936 to April 13, 1940: Yankees.

April 13, 1940 to October 6, 1941: Rangers.

October 6, 1941 to October 2, 1954: Yankees.

October 2, 1954 to October 4, 1955: Giants (baseball version).

October 4, 1955 to October 10, 1956: Dodgers.

October 10 to December 30, 1956: Yankees.

December 30, 1956 to October 9, 1958: Giants.

October 9, 1958 to January 12, 1969: Yankees.

January 12 to October 16, 1969: Jets.

October 16, 1969 to May 8, 1970: Mets.

May 8, 1970 to October 18, 1977: Knicks.

October 18, 1977 to May 24, 1980: Yankees.

May 24, 1980 to October 27, 1986: Islanders.

October 27, 1986 to January 25, 1987: Mets.

January 25, 1987 to June 14, 1994: Giants.

June 14, 1994 to June 24, 1995: Rangers.

June 24, 1995 to October 26, 1996: Devils.

October 26, 1996 to June 10, 2000: Yankees.

June 10 to October 26, 2000: Devils.

October 26, 2000 to June 9, 2003: Yankees.

June 9, 2003 to February 3, 2008: Devils.

February 3, 2008 to November 4, 2009: Giants.

November 4, 2009 to February 5, 2012: Yankees.

February 5, 2012 to, at the absolute minimum (in the unlikely event that the Jets win Super Bowl XLVIII on home soil), February 2, 2014: Giants.

1. New York Yankees: 43 years, 2 days.
-. New York Giants (baseball version): 20 years, 2 months, 5 days.
2. New York Giants (football version): 15 years, 27 days.
3. New York Knicks: 7 years, 5 months, 10 days.
4. New York Islanders: 6 years, 5 months, 2 days.
5. New Jersey Devils: 6 years, 4 months, 13 days.
6. New York Rangers: 3 years, 5 months, 22 days.
-. Brooklyn Dodgers: 1 year, 6 days.
7. New York Mets: 9 months, 21 days.
8. New York Jets: 9 months, 4 days.
9. Brooklyn Nets: Never.

However, if you count the ABA, then the New York Nets (as they were then known), having won the 1974 and 1976 titles, were the current New York Tri-State Area Champions from May 10, 1974 to October 18, 1977. That changes things, as follows:

1. New York Yankees: 43 years, 2 days.
-. New York Giants (baseball version): 20 years, 2 months, 5 days.
2. New York Giants (football version): 15 years, 27 days.
3. New York Islanders: 6 years, 5 months, 2 days.
4. New Jersey Devils: 6 years, 4 months, 13 days.
5. New York Knicks: 4 years, 2 days.
6. New York Rangers: 3 years, 5 months, 22 days.
7. Brooklyn Nets: 3 years, 5 months, 8 days.
-. Brooklyn Dodgers: 1 year, 6 days.
8. New York Mets: 9 months, 21 days.
9. New York Jets: 9 months, 4 days.

Since January 12, 1969 (just to make it fairer for the new teams)...

1. New York Giants: 11 years, 1 month, 17 days.
2. New York Yankees: 10 years, 10 months, 6 days.
3. New York Islanders: 6 years, 5 months, 2 days.
4. New Jersey Devils: 6 years, 4 months, 13 days.
5. New York Knicks: 4 years, 2 days.
6. Brooklyn Nets: 3 years, 5 months, 8 days.
7. New York Rangers: 1 year, 10 days.
8. New York Mets: 9 months, 21 days.
9. New York Jets: 9 months, 4 days.

Surprise! The Giants officially surpassed the Yankees in the post-Super Bowl III era on October 20.

However, the total number of World Championships is...

Yankees 27, Giants 8, baseball Giants 5, Rangers 4, Islanders 4, Devils 3, Mets 2, Knicks 2, Jets 1, Dodgers 1, Nets 0 (sort of, 2).

Old teams 46, new teams 10.

MLB 35, NHL 11, NFL 9, NBA 2.

But from January 12, 1969 onward, it's...

Yankees 7, Giants 4, Islanders 4, Devils 3, Mets 2, Knicks 2, Rangers 1, Jets 1, Nets 0 (sort of, 2).

Old teams 14, new teams 10.

MLB 9, NHL 8, NFL 5, NBA 2.

From June 24, 1995 onward, it's...

Yankees 5, Devils 3, Giants 2, Rangers 0, Mets 0, Islanders 0, Knicks 0, Jets 0, Nets 0.

Old teams 7, new teams 3.

MLB 5, NHL 3, NFL 2, NBA 0.

*

Closest each team has come to a title since their last:

(By time)
Devils: 2012 Finals.
Rangers: 2012 Conference Finals.
Jets: 2010-11 AFC Championship Game. (But never led in it.)
Yankees: 2010 ALCS.
Nets: 2003 Finals.
Mets: 2000 WS.
Knicks: 1999 Finals.
Islanders: 1984 Finals.
Giants: Haven't made Playoffs since their last Super Bowl win.

(By closeness)
Knicks: 1999 Finals, 1 win away.
Jets: 2009-10 AFC Championship Game, led at half.
Devils: 2012 Finals, 2 wins away.
Nets: 2003 Finals, 2 wins away.
Mets: 2000 WS, 3 wins away.
Islanders: 1984 Finals, 3 wins away.  (1993 Conference Finals, 7 wins away.)
Rangers: 2012 Conference Finals, 6 wins away.
Yankees: 2010 ALCS, 6 wins away.
Giants: Haven't made Playoffs since their last Super Bowl win.

*

1905-1923: National League.
1923-1933: American League.
1933-1936: National League.
1936-1954: American League.
1954-1956: National League.
1956-1969: American League.
1969-1977: National League.
1977-1986: American League.
1986-1996: National League.
1996-at least 2014: American League.  Though it's highly unlikely that the Mets will win the 2014 World Series.

American League: 68 years.
National League: 41 years.

Since October 16, 1969...

American League: 27 years.
National League: 18 years.

*

1925-1968: NFL/NFC.
1968-1986: AFL/AFC.
1986-at least 2013: NFC.

NFL/NFC: 70 years.
AFL/AFC: 18 years.

Since January 12, 1969...

NFC: 27 years.
AFC: 18 years.

*

1946-at least 2014: NBA, since the Nets have never won an NBA title.

NBA: 68 years.
ABA: 0 years.

Unless you count the ABA titles, in which case...

1946-1974: NBA.
1974-at least 2014: ABA, since the Knicks have never won another title.

ABA: 40 years.
NBA: 28 years.

*

1926-1980: New York City.
1980-1994: Long Island.
1994-1995: New York City.
1995-at least 2014: New Jersey.

New York City: 55 years.
(Suburbs: 33 years.)
New Jersey: 19 years.
Long Island: 14 years.

Since May 24, 1980...

(Suburbs: 33 years.)
New Jersey: 19 years.
Long Island: 14 years.
New York City: 1 year.

Ouch.

*

October 14, 1905 to January 12, 1969: Old teams.
January 12, 1969 to May 8, 1970: New teams.
May 8, 1970 to May 24, 1980: Old teams.
October 18, 1977 to January 25, 1987: New teams.
January 25, 1987 to June 24, 1995: Old teams.
June 24, 1995 to October 26, 1996: New teams.
October 26, 1996 to June 10, 2000: Old teams.
June 10 to October 26, 2000: New teams.
October 26, 2000 to June 9, 2003: Old teams.
June 9, 2003 to February 3, 2008: New teams.
February 3, 2008 to at least February 2, 2014: Old teams.

Old teams: 86 years, 11 months, 14 days.
New teams: 16 years, 16 days.

Since January 12, 1969...

Old teams: 24 years, 8 months, 15 days.
New teams: 16 years, 16 days.