Maria Elisabeth (Marie) Stellwag-Bes (14 January 1882 – 7 August 1938)[1] was a Dutch chemical engineer and city councillor in Delft for the Vrijzinnig Democratische Bond.

She is considered to be the first woman to receive an engineering diploma in the Netherlands and was one of the first three female city councillors in Delft.

[8] The election was the first held after a series of reforms, known as "the Great Pacification" which introduced universal male suffrage and proportional representation, replacing the previous first-past-the-post voting in single member constituencies.

She received about two thirds of the total 182 votes cast for the party, and sat on the Delft city council until March 1920.

After her marriage, Bes became active at the Lutheran Church in Delft, where among other things she worked as a teacher in the Sunday school.