Vishniac () may refer to:
People Ethan Vishniac (born 1955), American astrophysicist Roman Vishniac (1897–1990), Russian-American photographer and biologist Wolf V. Vishniac (1922–1973), American microbiologist who died during an expedition to Antarctica
Places Vishniac (crater), a crater on Mars, named after Wolf V. Vishniac Vishniac Peak, in Antarctica, named after Wolf V. Vishniac