Joonas Rönnberg (born February 19, 1983) is a Finnish professional ice hockey defenceman.

He previously played for Sheffield Steelers of the UK's Elite Ice Hockey League (EIHL).

[1] Rönnberg made his Swedish Hockey League debut playing with Leksands IF during the 2013–14 SHL season.

[2] After four seasons with Leksands, Ronnberg left as a free agent to sign a one-year contract in Germany with Düsseldorfer EG of the DEL on May 26, 2015.

[3] In June 2017, Rönnberg moved to the UK to sign for EIHL side the Sheffield Steelers on a one-year contract.