Niemirowski, feminine: Niemirowska is a Polish-language toponymic surname meaning "from Nemyriv (now Ukraine)" or "from Niemirów (Poland)".

As a Polish noble surname, it, together its variant, Niemierowski, belonged to the Trzaska coat of arms heraldic clan.

The Russian-language variant is Nemirovsky / Nemirovskaya, the Ukrainian one is Nemyrivskyi / Nemyrivska.

The surname may refer to: