Ernst Mauritz Dahlin (1843–1929) was a Swedish mathematician who is known by his work on history of mathematics.

He became a student at Uppsala University in 1869, Philosophy graduate in 1873 and PhD in 1875 with a thesis about the history of mathematics in Sweden before 1679.

[1] [2] In the same year, Dahlin was named lecturer in the history of mathematics at Uppsala University, but when the subject was considered too specific, he instead became lecturer in mathematics.

Prior to leaving the university, he had prepared a continuation of the history of Swedish mathematics after 1679.

Instead, he became an extraordinary official in the Riksbank in 1876, and in the same year he was teacher at the prison at Långholmen.