Lipniki [lipˈniki] is a village in the administrative district of Gmina Łyse, within Ostrołęka County, Masovian Voivodeship, in east-central Poland.

Established in 1663 by Wiśniewski, a settler from Piotrków Trybunalski, Lipniki is the oldest historically documented village in the Kurpie region of Poland.

The name "Lipniki" most likely comes from the Polish "lipa," or linden tree, which grow in abundance in the village and environs.

There are however those who claim that the name comes from a variety of shoes made from linden wood called "Lipnioki."

Among structures considered historically significant are: The founder of Lipniki was a man named Wiśniewski, supposedly a nobleman, who was an escapee from the settlement of Piotrków Trybunalski.