Niinistö is a Finnish surname. Notable people with the surname include:
- Jussi Niinistö (born 1970), Finnish politician and historian
- Sauli Niinistö (born 1948), President of Finland since March 1, 2012
- Ville Niinistö (born 1976), Finnish politician
Niinistö is a Finnish surname. Notable people with the surname include: