Original Masita Match-Issue football shirt VVV Venlo 2020/21

Simon Janssen(born 25 September 2000) is a Dutch professional footballer who plays as a left-back for Eerste Divisie club VVV-Venlo.

Janssen progressed through the VVV-Venlo youth academy after arriving there from the SV Blerick in 2010. He made his professional debut for the club on his 18th birthday on 25 September 2018 in a 3–0 away win in the KNVB Cup over Westlandia, replacing Tino-Sven Sušić in the 73rd minute. He made his Eredivisie debut three months later in a 4–1 loss to Feyenoord on 6 December 2018, coming off the bench for Evert Linthorst.

On 18 April 2019, Janssen signed a two-year contract with VVV, with an option for an additional year. Three months later he received the Jan Klaassens Award [nl], the yearly award for VVV's best academy player.

VVV exercised the option in Janssen's contract in March 2021, keeping him in Venlo until 2022. On 7 December 2021, he signed a two-year contract extension until 2024, with a unilateral option to extend for a further year. At that point Janssen, originally a midfielder, was converted to play left-back by head coach Jos Luhukay.

On 17 February 2023, Janssen scored his first professional goal, securing VVV's 2–1 away win against Dordrecht in injury time. This came after Dordrecht had earlier equalised during injury time.