Hildegard "Hilde" Mattheis (née Gudelius, born 6 October 1954) is a German teacher and politician of the Social Democratic Party of Germany (SPD) who served as a member of the Bundestag from 2002 until 2021.

Appointed by Federal Minister of Health Hermann Gröhe, she served as member of an expert commission on the reform of Germany’s hospital care from 2015 until 2017.

[7] Mattheis was (together with her running mate Dierk Hirschel) a candidate for the 2019 Social Democratic Party of Germany leadership election;[8] however, she withdrew her candidacy shortly before the vote.

In July 2020, Mattheis announced that she would not stand in the 2021 federal elections but instead resign from active politics by the end of the parliamentary term.

[9] Mattheis was one of the most vocal opponents of her party’s decision to enter into negotiations to form a coalition government under the leadership of Chancellor Angela Merkel following the 2017 federal elections.