Adam Kwasnik (born 31 May 1983) is an Australian former professional association football player who played as a striker.

Kwasnik started in the 2008 A-League Grand Final that the Mariners lost 1–0.

'Kwas', as he is known to teammates and fans alike, is second on the Mariners all-time leading goalscorers list with 35 goals from 136.

[2] He debuted in the season opener against Shandong Luneng and equalized to make it 3–3.

He is currently involved with youth clinics in the Central Coast area and still associated with the Mariners.