Tranquillo Barnetta (Italian pronunciation: [traŋˈkwillo barˈnetta]; born 22 May 1985) is a Swiss former professional footballer who played as a midfielder.

Barnetta's debut season in Switzerland was noticed abroad and was soon snapped up by German side Bayer Leverkusen in January 2004.

During the summer transfer window, he was linked with a move away from Bayer as his place in the squad seemed under threat from loanee Toni Kroos.

[9] Integrating with the Union, who were midway through their season, Barnetta netted his first goal on 20 September, in a home win against the Houston Dynamo.

Barnetta cited he wanted to contribute to his hometown club in front of friends and family while he still had the fitness to do so meaningfully.

[13][14] Barnetta is a former youth international and was in the Swiss U-17 squad that won the 2002 U-17 European Championships along with future senior teammates Philippe Senderos and Reto Ziegler.

[20][21] Known for his "extreme pace, mobility and creativity" on the left flank,[2] FIFA's official website describes Barnetta as a "primarily a creative footballer", who also "covers ground and closes down opponents on the football pitch with the sort tireless energy and dogged determination one might expect from a tigerish central midfielder".

[23] Since retiring from professional football, Barnetta has become a stay-at-home dad, taking care of their two children while his wife works as a physician.