Marc David Polmans (born 2 May 1997) is a South African-born Australian professional tennis player.

Polmans received a wildcard entry to the 2017 Croatia Open, marking his first singles main draw appearance on the ATP World Tour.

In July, Polmans made the main draw of the Citi Open in Washington as a lucky loser, losing to Jared Donaldson.

[5] Polmans ended the year on the Challenger circuit with his best result being a semi-final appearance at Canberra.

In February, Polmans won his maiden challenger title at the 2018 Launceston Tennis International.

In October, Polmans partnered Jeremy Beale to win his first doubles challenger title at Traralgon.

In March, Polmans won his second ATP Challenger title when defeating Italy's Lorenzo Giustino 6–4, 4–6, 7–6(4).

Polmans defeated Malek Jaziri for his first main draw win on the ATP Tour.

In January participating again as a wildcard, Polman won his first main draw singles match at the Australian Open over Mikhail Kukushkin.

[10] Polmans also won his first French Open match as a lucky loser against Ugo Humbert.

In July, Polmans reached the quarterfinal at the Kitzbühel Open in doubles partnering Pedro Martinez.

[15] He was disqualified in the last round of qualifications at the 2023 Rolex Shanghai Masters for hitting a ball at the umpire in frustration and subsequently lost all the rankings points and prize money.

154 he also received another wildcard for the main draw and his forth overall but lost in straight sets to compatriot Alexei Popyrin.

Polmans was coached by former Top 100 player, Peter Luczak, at the Tennis Australia National Academy in Melbourne.