Palainiškiai (formerly Russian: Палайнишки, Polish: Pałajniszki) is a village in Kėdainiai district municipality, in Kaunas County, in central Lithuania. According to the 2011 census, the village was uninhabited. It is located 3 kilometres (1.9 mi) from Ąžuolaičiai, by the Kėdainiai-Krakės road, inside the Josvainiai Forest, by the Smilga river. The Smilga Landscape Sanctuary in located next to Palainiškiai.

At the beginning of the 20th century there was Palainiškiai estate in Josvainiai volost.

Historical population

Year Pop. ±% p.a. 1902 20 —     1923 32 +2.26% 1959 22 −1.04% 1970 11 −6.11%	Year Pop. ±% p.a. 1979 7 −4.90% 1989 3 −8.12% 2001 0 −100.00% 2011 0 0.00%
Source: 1902, 1923, 1959 & 1970, 1979, 1989, 2001, 2011