Peter Paul Maria Alberdingk Thijm (21 October 1827, at Amsterdam – 1 February 1904, at Leuven) was a Dutch academic and writer.
He made his studies in his home city, at first at the Gymnasium and later at the Athenaeum, from which he graduated in letters and history in 1857. For some years he was instructor in history in Maastricht. After being called to a professorship in the Catholic University of Leuven in 1870, he succeeded in establishing a chair for the special study of the history of the literature of the Netherlands.
He was vice president of the student association "Met Tijd en Vlijt" and of "Constantius Buter". He was also the member of the Royal Academy of Dutch language and literature, and for a time, its president. From 1888 on, Paul Thijm edited the periodical Dietsche Warande, which he transplanted into Belgium.
He was the first chairman of the Davidsfonds (1875 - 1878).
The writer Joseph Albert Alberdingk Thijm was his brother.
His main works are: