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