The original three-year sponsorship is to be extended by a further three years to 2016.
Manchester United commercial director Richard Arnold comments:
"Singha celebrates its 80th anniversary in 2013 and what better way to commemorate this than to renew our successful relationship. Manchester United is delighted to be keeping Singha within its family of sponsors and looking forward to building on the fantastic achievements the partnership has created so far.
"I am confident the next three years will be just as positive."