| Clubname: | Athletik Sportklub |
| Fullname: | Athletik Sportklub Cilli |
| Nickname: | Atletiki / Athletiker (The Athletes) |
| Founded: | [1] |
| Ground: | Sportplatz Felsenkeller |
| Capacity: | 2,130 |
| Pattern La1: | _blue_hoops |
| Pattern B1: | _bluehoops |
| Pattern Ra1: | _blue_hoops |
| Pattern So1: | _yellowtop |
| Leftarm1: | ffef00 |
| Body1: | ffef00 |
| Rightarm1: | ffef00 |
| Shorts1: | 0000ff |
| Socks1: | 0000ff |
Athletik Sportklub, commonly referred to as Athletik SK or simply Athletik, was a Slovenian football club from Celje. The club was founded in 1906 by the Germans of Celje.[1] It was also referred to as Cillier Sportverein in the first part of the 1920 season.
Austrian striker Karl Dürschmied was in 1921 holding a post of player-manager at the club, and he accepted playing for the team of the Ljubljana Football Subassociation in a friendly exhibition game against France national football team, a game often considered as the first ever game of the Slovenian national team.[2]
Runners-up (1): 1920–21
Winners (1): 1930
Runners-up (1): 1927