Marek Marceli Józef Jan Chrzciciel Tarczewski (18 June 1782 – 30 August 1843) was a Polish lawyer, official and attorney who defended Polish conspirators, as well as publisher and freemason.
He graduated in law from the Albertina University of Königsberg, and became an assessor at the Civil Tribunal, and then a sub-prosecutor at the Court of Appeal of the Duchy of Warsaw.
After the establishment of the Congress Poland in 1815, he started a legal practice and participated in the trials at the cassation Supreme Court as a legal representative.
In political trials, he defended Polish conspirators who acted against Russian domination in the Congress Poland.
In the first trial of the Patriotic Society, Tarczewski defended Mikolaj Dobrzycki.
In the second trial, he was a representative of Stanislaw Soltyk, the president of the Patriotic Society, and made Soltyk was given pardon.
His speeches and pleadings were printed and publicized.
In 1820s, he was a member of the Governmental Committee of Internal Affairs and Police of the Kingdom of Poland.
Together with his wife Aleksandra née Tanska, he ran a popular salon in Warsaw.
At the end of the November Uprising he was a candidate for the Minister of Justice in the National Government.