Csík may refer to:

• Csík County, part of the Kingdom of Hungary from 1876 to 1918

and to several places in Harghita County, Romania, that have the prefix as part of their Hungarian-language name:

• Bancu (Csíkbánkfalva), a village in Ciucsângeorgiu Commune
• Bârzava (Csíkborzsova), a village in Frumoasa Commune
• Ciceu (Csíkcsicsó), a commune
• Şoimeni (Csíkcsomortán), a village in Păuleni-Ciuc Commune
• Ciucani (Csíkcsekefalva), a village in Sânmartin Commune
• Dănești (Csíkdánfalva), a commune
• Delniţa (Csíkdelne), a village in Păuleni-Ciuc Commune
• Ineu (Csíkjenőfalva), a village in Cârța Commune
• Cârța (Csíkkarcfalva), a commune
• Cozmeni (Csíkkozmás), a commune
• Mădăraș (Csíkmadaras), a commune
• Siculeni (Csíkmadéfalva until 1899), a commune
• Armăşeni (Csíkménaság), a village in Ciucsângeorgiu Commune
• Leliceni (Csíkszentlélek), a commune
• Păuleni-Ciuc (Csíkpálfalva), a commune
• Racu (Csíkrákos), a commune
• Șumuleu Ciuc (Csíksomlyó), a neighborhood in Miercurea Ciuc city
• Tomești (Csíkszenttamás), a commune
• Ciucsângeorgiu (Csíkszentgyörgy), a commune
• Sântimbru (Csíkszentimre), a commune
• Sâncrăieni (Csíkszentkirály), a commune
• Leliceni (Csíkszentlélek), a commune
• Nicoleşti (Csíkszentmiklós), a village in Frumoasa Commune
• Mihăileni (Csíkszentmihály), a commune
• Sânmartin (Csíkszentmárton), a commune
• Sânsimion (Csíkszentsimon), a commune
• Tomești (Csíkszenttamás), a commune
• Frumoasa (Csíkszépvíz), a commune
• Miercurea Ciuc (Csíkszereda), a city and the county seat
• Vrabia (Csíkverebes), a village in Tușnad Commune
• Jigodin (Csíkzsögöd), part of Jigodin-Băi village in Miercurea Ciuc city

(In the Kingdom of Hungary, these were all part of Csíkszék, a Székely "seat" or settlement merged into Csík County in 1876.)

and to:

• Vărgata (Csíkfalva), a commune in Mureș County, Romania