Marie Janssen

{{short description|Belgian tennis player}}

{{Use dmy dates|date=July 2020}}

{{Infobox tennis biography

| name = Marie Janssen

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| country = {{BEL}}

| birth_date = 1899

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Marie Janssen (born 1899, date of death unknown) was a Belgian tennis player. She competed in the women's singles event at the 1924 Summer Olympics.{{cite web|url=https://www.olympedia.org/athletes/678 |title=Marie Janssen |work=Olympedia |accessdate=12 July 2020}}