Slonina or Słonina is a surname. Notable people with the surname include:
Gabriel Slonina (born 2004), Polish American goalkeeper Jimmy Slonina, actor Łukasz Słonina (born 1989), Polish biathlete Nicholas Slonina (born 2001), Polish American soccer player Patricia Slonina, first woman editor of the literary magazine, The Alembic at Providence College Robin Barcus Slonina (born 1971), American artist Stanisław Słonina, 2007 Per Artem ad Deum Medal
See also Salo (food), known as słonina in Polish