Tony van Diepen (; born 17 April 1996) is a Dutch track and field athlete competing in the 400 and 800 metres. He won the bronze medal in the 400 m at the 2019 European Indoor Championships and silver at the 2021 European Indoor Championships. Van Diepen earned five medals with Dutch 4 ÃÂ 400 m relays, either men's or mixed, at major championships, including silver for the men's relay at the 2020 Tokyo Olympics.
He took four national titles.