Sumanya Purisai (Thai: สุมัญญา ปุริสาย; born December 5, 1986) is a Thai professional football player who plays as an Attacking Midfielder for Thai Leagues 1 club Bangkok United.
Purisai played for Osotsapa in the 2007 AFC Champions League group stages, scoring one goal. Purisai moved to Buriram FC in 2011, and won the 2011 Thai Division 1 League with them. After that he moved to Buriram United FC, expectations were high for him in Buriram United. He was not very successful with Buriram United, resulting in a move to Chainat Hornbill. Purisai was Chainat Hornbill’s starting eleven, he regained his confidence in Chainat Hornbill. He continued to perform well in Chainat Hornbill. The 2013 Thai Premier League was Purisai’s year as he scored and assisted many goals for Chainat Hornbill.
He played for the Thailand national under-23 football team at the 2009 Southeast Asian Games. He scored an unofficial penalty against Denmark League XI in the 2012 King’s Cup and also was part of the 2012 AFF Suzuki Cup and replaced Datsakorn Thonglao after Datsakorn suffered a groin injury during the tournament.