Gertruida Johanna "Trudy" Groenman (born 15 January 1944) is a Dutch former tennis player.

[2][3] In 1964 she also won the Netherlands national women's doubles championship, with Anja Lepoutre, a fellow member of the Groningen Lawn Tennis Club, and the Netherlands national mixed doubles championship, with Tom Okker.

[2][4][5] In 1967 she reached the final of the US Indoors, where she lost to Billie Jean King 6–1, 6–0.

[7] After a pause in her tennis career to raise a family, she became Netherlands senior champion,[2] beating Els Veentje in the over-40s group.

[2] Groenman was a left-handed player, whose style was compared to Billie Jean King's.