Beinaičiai (formerly Russian: Бейнайце, Polish: Benajcie, Bejnajcie) is a village in Kėdainiai district municipality, in Kaunas County, in central Lithuania. According to the 2011 census, the village had a population of 267 people. It is located 11 kilometres (6.8 mi) from Kėdainiai, by the Šėta-Nociūnai road. There is a library and a former school.

There was Beinaičiai village and folwark in the beginning of the 20th century.

During the Soviet times, Beinaičiai was a kolkhoz center.

Historical population

Year Pop. ±% p.a. 1902 207 —     1923 172 −0.88% 1959 133 −0.71% 1970 128 −0.35% 1979 169 +3.14%	Year Pop. ±% p.a. 1984 173 +0.47% 1989 330 +13.79% 2001 325 −0.13% 2011 267 −1.95%
Source: 1902, 1923, 1959 & 1970, 1979, 1989, 2001, 2011