Romke Harke de Jong (born 5 April 1984) is a Dutch entrepreneur and politician of the social liberal party Democrats 66 (D66). He took over and expanded his father's ice cream catering company and served on the municipal council of Opsterland in Friesland between 2010 and 2018. De Jong became a member of the States of Friesland the following year, and he was elected to the House of Representatives in the 2021 general election.

De Jong was born in 1984 in the Friesland city of Heerenveen and grew up in the nearby town of Gorredijk.^[5][6] His father was the owner of a restaurant and a Gorredijk ice cream catering company, founded by Romke's grandfather in 1947, called De Jong's IJs.^[7] His father also served as an Opsterland municipal councilor and alderman for D66 in the 1990s.^[8] De Jong started working for De Jong's IJs in his teenage years, and he studied commercial economics at the Hanze University of Applied Sciences in Groningen.^[7][9]

In 2006, while studying, he became co-owner of De Jong's IJs.^[7][10] De Jong and his father expanded their company by constructing a larger factory and by starting a franchise chain of ice cream and chocolate shops under the name Lilly's. Several locations were opened in 2009, most of them located in the northern provinces of the Netherlands.^[11][12] A Lilly's store on the Caribbean island Bonaire was opened in early 2011.^[13] The number of locations kept increasing to over ten until a spike was reached.^[14] Lilly's had six stores left in 2016, while the production capacity of De Jong's IJs was being raised.^[15] De Jong also invested to make his factory carbon neutral. His father temporarily took over as CEO when he became an MP in 2021.^[16][17]

De Jong lives in the Friesland town of Gorredijk, where he has lived his entire life except for when he studied in Groningen.^[5][37] He has a wife called Wendel and three sons, the last of whom was born in March 2021.^[16][17][38]