The 2021 Tour of Slovenia (Slovene: Dirka po Sloveniji) was the 27th edition of the Tour of Slovenia stage race that was held from 9 to 13 June 2021.

[1] The 2.Pro-category race was initially scheduled to be a part of the inaugural edition of the UCI ProSeries, but after the 2020 edition was cancelled due to the COVID-19 pandemic,[2] it made its UCI ProSeries debut in 2021, while also still being a part of the 2021 UCI Europe Tour.

The race was won for the first time by Tadej Pogačar of UAE Team Emirates.

He proceeded to extend his lead to more than a minute on the way to the finish in Celje.

He successfully defended his lead on the final three stages, including finishing second to his teammate, Diego Ulissi, on the queen stage to Nova Gorica.