Ryszard Jerzy Petru (born 6 July 1972; Wroclaw, Poland) is a Polish politician.
He served as an assistant to several members of parliament in the 1990s.
He has worked as an economist for the World Bank, PricewaterhouseCoopers and several Polish banks.
Since 2011, he has been the chairman of the Association of Polish Economists.
He is the author of several books, including two children's books on economics.
In 2015, Petru founded a liberal political party .Modern (.Nowoczesna).
The party received 7.6% of votes in the 2015 Polish parliamentary election.
Petru was elected to the Sejm from Warsaw (19) district.