Jonathan Fischer is a Danish goalkeeper. He developed at Akademisk Boldklub and made his senior debut in the Danish 2nd Division in 2019 before moving to Hobro in 2022. In January 2024 he joined Fredrikstad in Norway, where he was part of the side that won the 2024 Norwegian Cup after a penalty shootout. Metz signed him in July 2025 on a contract through 2029. He has also represented Denmark at under-19 level.