Mohd Yusmadi bin Mohd Yusoff (Jawi: محمد يسمدي بن محمد يوسف; born 12 October 1974) is a Malaysian politician and was the Member of the Parliament of Malaysia for the Balik Pulau constituency in Penang, Malaysia from 2008 to 2013.

He is also active in defending cases assigned by YBGK (National Legal Aid Foundation).

[4] He is the founder and chairman of the non-profit organization RIGHTS Foundation which promotes constructive engagement and interaction on the issues of Governance, Human Rights and Social Justice in the region through forums, seminars, advocacy work, dialogues and publications.

He broke the record by winning the seat for the first time ever since 1999 for PKR with the majority of 708 votes against Norraesah Binti Mohamad (UMNO).

[5] Nevertheless, during the Malaysia General Election in 2013, he was not contested to focus on his non-profit organizations and human rights activities, as well as to make way for Muhammad Bakhtiar Wan Chik, who was eventually unsuccessful in winning the seat.