Romainiai is a city part (miesto dalys) in the northwestern part of Kaunas, Lithuania, north of . It is part of the à  ilainiai elderate (since 2000).
Romaniai lies by the Romaniai Street within the Romaniai forest park. To the east of Romaniai forest there is the Linkuva forest and the à  ilainiai forest to the west.
Romaniai was first mentioned in the 14th century in the Teutonic Order chronicles. It was annexed to Kaunas in 1997.