Brian Timmermans (born 15 September 1997) is a Dutch karateka. He won the silver medal in the men's kumite 84kg event at the 2023 European Games held in Poland. He won one of the bronze medals in the men's 84kg event at the 2023 European Karate Championships held in Guadalajara, Spain.
In 2021, Timmermans competed in the men's 84kg event at the World Karate Championships held in Dubai, United Arab Emirates. He also represented the Netherlands at the 2022 World Games held in Birmingham, United States. He competed in the men's 84kg event. He also competed in the men's 84kg event at the 2025 World Games held in Chengdu, China.