Ilnicki (feminine: Ilnicka; plural: Ilniccy) is a Polish surname. Notable people with this surname include:
Ed Ilnicki (born 1995), Canadian football player Jake Ilnicki (born 1992), Canadian rugby player Maria Ilnicka (1825–1897), Polish writer and activist Maria Ilnicka-Mądry (1946–2023), Polish politician
See also
Ilnytskyi, a related Ukrainian surname