Bartninkai is a small town in Marijampolė County, Vilkaviškis District Municipality in southwestern Lithuania.

It is the seat of the Bartninkai Eldership.The town is home to the Church of St. Peter and St. Paul, a post office, a clinic, the Bartininkai Jonas Basanavičius High School, a library, and the grounds of the former Bartininkai manor.

Treasurer of the Grand Duchy of Lithuania Antoni Tyzenhauz turned the town into the estate of Bartininkai manor.

After the November Uprising of 1830–1831, the Tsar gifted Bartninkai to the Imperial Russian Army Officer of Nostitz family, who declared the estate a majorate.

In 1999 the coat of arms of Bartininkai was adopted by a decree of the President of the Republic of Lithuania.