Yaw Appau is a Ghanaian judge who has served as a justice of the Supreme Court of Ghana from July 2015 to August 2021.

Appau was born on 2 August 1951 at Badu, a town in the Tain District of the Brong Ahafo Region.

[2] He is a tribal Koulango who live mostly in the Bono region of Ghana and the Zanzan district of Ivory Coast.

[2] He was in Prempeh College in 1965 but was unable to complete his studies for his Ordinary-Level ('O'-Level) certificate due to financial constraints.

[2] He resigned from the NIC in May 1985 and entered private legal practice at Barimah Chambers, Sunyani.

While serving in that capacity, he was appointed on 8 October 2012 as the Sole Commissioner of the Commission of Inquiry to look into Judgment Debts and other matters.

[5] He was part of a seven-member panel constituted by the Chief Justice, that heard the 2020 election petition by John Mahama against The Electoral Commission of Ghana and Nana Akufo-Addo.