Grand Sport is a sports equipment manufacturing company based in Thailand. It was established in 1961 by Kij Pluchcha-oom, a former basketball player.

Grand Sport products have been accepted by recognized organizations such as the Asian Volleyball Confederation, Football Association of Singapore, Bahrain Football Association, Oman Football Association, Qatar Football Association, Kuwait Football Association, Uzbekistan Football Federation, Football Federation of Kyrgyz Republic, and Qatar, Oman, Vietnam Olympic Committee. Grand Sport also provides various clubs with kits, such as Dhofar in Oman, and previously Qatar S.C. in Qatar. Now Grand Sport provides for Football Association of Thailand and the Sri Lanka Referees Association.

Grand Sport is the Official ball supplier for the following leagues and associations: