| Year | Champion | Runner-Up | Summary |
|---|---|---|---|
| 2019 | Havas | Mindshare |
 2019 NYACSL Champions – Havas Havas wins back-to-back championships in a tough contested 3-2 win vs Mindshare. Second appearance in the championship game for Havas. Sixth appearance in the championship game for Mindshare. |
| 2018 | Havas | Merkley + Partners |
 2018 NYACSL Champions – Havas Havas wins their first championship in a tough contested 5-4 win vs Merkley + Partners. First appearance in the championship game for Havas. Sixth appearance in the championship game for Merkley + Partners. |
| 2017 | Saatchi & Saatchi Wellness | MDC Media Partners |
 2017 NYACSL Champions – Saatchi & Saatchi Wellness Continuing the winning tradition of the Saatchi name, second appearance in championship game and second championship for Saatchi & Saatchi Wellness. First appearance in championship game for MDC Media Partners. |
| 2016 | Saatchi & Saatchi Wellness | Mediaedge |
 2016 NYACSL Champions – Saatchi & Saatchi Wellness First appearance in the championship game and first championship for Saatchi & Saatchi Wellness. Second appearance in the championship game for Mediaedge. |
| 2015 | Mindshare | Digitas |
 2015 NYACSL Champions – Mindshare A repeat of the championship game the prior year, same result. Fifth appearance in a championship game and third (second consecutive) championship for Mindshare. Second appearance in the championship series for Digitas. |
| 2014 | Mindshare | Digitas |
![](http://www.nyacsl.org/wp-content/uploads/2019/05/2014-NYACSL-Champions-Mindshare.jpg") 2015 NYACSL Champions – Mindshare Fourth appearance in a championship game and second championship for Mindshare. First appearance in the championship series for Digitas. |
| 2013 | Merkley + Partners | Mindshare | Fifth appearance in a championship game and fifth consecutive championship for Merkley + Partners. Third appearance in the championship series for Mindshare. |
| 2012 | Merkley + Partners | Mediaedge | Fourth appearance in a championship game and fourth consecutive championship for Merkley + Partners. First appearance in the championship series for Mediaedge. |
| 2011 | Merkley + Partners | Mediavest | Third appearance in a championship game and third consecutive championship for Merkley + Partners. First appearance in the championship series for Mediavest. |
| 2010 | Merkley + Partners | McCann-Erickson | Second appearance in a championship game and second consecutive championship for Merkley + Partners. Eighteenth appearance in the championship series for McCann. |
| 2009 | Merkley + Partners | McCann-Erickson | First appearance in championship game and first championship for Merkley + Partners. Seventeenth appearance in the championship series for McCann. |
| 2008 | Mindshare | Young and Rubicam | Second appearance in championship game and first championship for Mindshare. First appearance in the championship series for Young and Rubicam. |
| 2007 | Fat Bastehds | McCann-Erickson | First appearance in championship game and first championship for Fat Bastehds. Sixteenth appearance in the championship series for McCann. |
| 2006 | Saatchi & Saatchi | FCB | Saatchi’s sixth championship. The core of the Saatchi team retires in style, going out on top. FCB’s second appearance in a championship game. |
| 2005 | Draft | Mindshare | Second appearance in championship game and first championship for Draft. First time since 1993 that championship team is not McCann or Saatchi. First appearance in championship game for Mindshare. |
| 2004 | Saatchi & Saatchi | McCann-Erickson | Saatchi’s fifth championship. McCann becomes first team with eleven consecutive appearances in the championship. |
| 2003 | McCann-Erickson | Draft | McCann first nine-time league champions. McCann becomes first team with ten consecutive appearances in the championship. First appearance in the championship game for Draft. |
| 2002 | Saatchi & Saatchi | McCann-Erickson | Saatchi’s fourth championship. McCann becomes first team with nine consecutive appearances in the championship. McCann and Saatchi in fourth consecutive championship series. |
| 2001 | McCann-Erickson | Saatchi & Saatchi | McCann first eight-time league champions. McCann becomes first team with eight consecutive appearances in the championship. McCann and Saatchi in third consecutive championship series. |
| 2000 | McCann-Erickson | Saatchi & Saatchi | McCann first seven-time league champions. McCann becomes first team with seven consecutive appearances in the championship. McCann and Saatchi in second consecutive championship series. |
| 1999 | Saatchi & Saatchi | McCann-Erickson | Saatchi’s third championship. McCann becomes first team with six consecutive appearances in the championship. |
| 1998 | McCann-Erickson | Grey | McCann first six-time league champions. McCann becomes first team with five consecutive appearances in the championship. |
| 1997 | McCann-Erickson | Partners & Shevack | McCann first five-time league champions. McCann joins Marschalk with fourth consecutive appearance in championship. |
| 1996 | Saatchi & Saatchi | McCann-Erickson | Saatchi’s second championship. |
| 1995 | McCann-Erickson | DMB&B | McCann joins Donovan as four time champions. |
| 1994 | McCann-Erickson | Saatchi & Saatchi | McCann’s third championship. |
| 1993 | BBDO | Donovan Data Systems | BBDO’s first championship. Donovan in finals ninth time in eighteen years. |
| 1992 | Grey | BBDO | Grey’s first championship. First championship appearance for both teams. |
| 1991 | Donovan Data Systems | Backer Spielvogel Bates | Donovan becomes first four-time champion. Donovan in finals for eighth time in sixteen years. |
| 1990 | McCann-Erickson | Backer Spielvogel Bates | McCann’s second title. First time charter team beats company that didn’t exist when league was founded. |
| 1989 | Saatchi & Saatchi | Donovan Data Systems | First championship for Saatchi. |
| 1988 | Donovan Data Systems | McCann-Erickson | First ‘wild-card’ team to win championship. Donovan joins Esty and Marschalk as three-time champions. |
| 1987 | William Esty | Saatchi & Saatchi | Esty first team to win after losing game one. Esty joins Marschalk as three-time champions. |
| 1986 | McCann-Erickson | Donovan Data Systems | McCann’s first league championship. |
| 1985 | William Esty | Donovan Data Systems | First championship to go to three games. |
| 1984 | William Esty | Foote, Cone & Belding | First best-of-three championship. Esty wins in two games. |
| 1983 | Marschalk | Doyle Dane Bernbach | Marschalk first team to win three championships. Marschalk in finals fourth consecutive year. |
| 1982 | Marschalk | Donovan Data Systems | First extra-inning championship game. Marschalk wins 1-0 in ten innings. |
| 1981 | Della Femina | Marschalk | 1st nine-inning championship game. First game Marschalk loses in two seasons |
| 1980 | Marschalk | Wunderman, Ricotta & Klein | Championship played in East Meadow, Central Park |
| 1979 | Warwick Advertising | Della Femina | Last championship played in Sheep Meadow, Central Park |
| 1978 | Doyle Dane Bernbach | S&S Advertising | First championship to be replayed due to rain/darkness |
| 1977 | Donovan Data Systems | McCann Erickson | Donovan wins back-to-back championships |
| 1976 | Donovan Data Systems | Doyle Dane Bernbach | 1st League Championship |
