Riad Haidar (1 August 1951 – 25 May 2023; Arabic: ریاض حیدر) was a Polish politician, physician, and social activist.

[4] In 2003, he finished postgraduate studies at the Maria Curie-Skłodowska University in Lublin with a degree in healthcare project management, and in 2008, he graduated from the University of Economics and Innovation in Lublin with a degree in the healthcare service management and administration.

[4][2] For many years he was a regional chief of staff of the Great Orchestra of Christmas Charity branch in Biała Podlaska.

[13] Later, after the 2023 Polish parliamentary election, he would have had received a right to the seat left by Krzysztof Hetman, who has resigned to join the Sejm.

[20] On 2 January 2020, people organized a protest infronto the hospital in Biała Podlaska, in support of Haidar.

[17] His case was supported by, among others, senator and human rights activist Adam Bodnar,[21] and journalist and social campaigner Jerzy Owsiak.

[23][24][25][26] In November 2020, Haidar became involved in the organization of the local structures of the Polish Initiative party, while never formally joining it.

[5] On 1 June 2023, he was posthumously awarded the Knight's Cross of the Order of Polonia Restituta by the president of Poland, Andrzej Duda.