Isak Dahlqvist

IFK Göteborg

Up until Dahlqvist was fourteen years old, he played for his hometown team Öckerö IF, before moving on to IFK Göteborg's youth setup in 2016. In 2020 Dahlqvist played his first game for the first team in a Svenska Cupen match against Husqvarna FF. In January 2021, Dahlqvist signed his first professional contract with IFK Göteborg, lasting three years.

Örgryte IS

After several years at IFK Göteborg, Dahlqvist signed with Superettan club Örgryte IS in January 2022. The contract lasted until the end of the 2024 season, and was in 2023 extended until the end of the 2025 season. At Örgryte IS, Dahlqvist played 121 games in all competitions, while his last season with the club ended in promotion to the Allsvenskan.

Blau-Weiß Linz

As Dahlqvist's contract with Örgryte IS ended after the 2025 season, he signed with Austiran side Blau-Weiß Linz. The first season at the club ended with eleven games in the league and relegation for the club.

Tromsø

In June 2026, after Blau-Weiß Linz relegation, Dahlqvist terminated his contract with the club and was signed by Norwegian club Tromsø on a three-and-a-half year contract. The club had previously tried to sign Dahlqvist in the summer of 2025, but eventually went with Alexander Warneryd instead.

Dahlqvist has played one game for Sweden U17 and two games for Sweden U19.

As of 31 August 2026

He is the younger brother of fellow footballers Hampus and Edvin Dahlqvist.