Jonas Omlin (born 10 January 1994) is a Swiss footballer who plays for FC Basel as a goalkeeper.
Omlin played for SC Kriens in the 1. Liga Promotion. He moved on to FC Luzern, but was loaned out to Le Mont-sur-Lausanne for the 2015/16 season. He returned to Luzern for two seasons.
On 22 June 2018 Basel announced that they had signed goalkeeper Omlin from Luzern. Under trainer Marcel Koller Basel won the Swiss Cup in the 2018–19 season. In the first round Basel beat FC Montlingen 3–0, in the second round Echallens Région 7–2 and in the round of 16 Winterthur 1–0. In the quarter finals Sion were defeated 4–2 after extra time and in the semi finals Zürich were defeated 3–1. All these games were played away from home. The final was held on the 19 May 2019 in the Stade de Suisse Wankdorf Bern against Thun. Striker Albian Ajeti scored the first goal, Fabian Frei the second for Basel, then Dejan Sorgić netted a goal for Thun, but the end result was 2–1 for Basel. Omlin played in four cup games.