Potočnik is seventh most frequent[1] surname in Slovenia. It is most common in the northern and eastern regions of the country, while it is almost nonexistent in the west and south.[2] It may refer to:
- Herman Potočnik (1892–1929), Slovene rocket engineer and pioneer of astronautics
- Janez Potočnik (1749–1834), Baroque painter
- Janez Potočnik (born 1958), Slovenian politician