Mantviloniai is a village in Kėdainiai district municipality, in Kaunas County, central Lithuania. It is located by the country road Aristava-Kėdainiai-Cinkiškiai. There is a meat factory located in the Mantviloniai village area. According to the 2011 census, the village has a population of 19 people.

Historical population

Year Pop. ±% p.a. 1902 145 —     1923 112 −1.22% 1959 92 −0.54% 1970 137 +3.69%	Year Pop. ±% p.a. 1979 4 −32.47% 1989 35 +24.22% 2001 30 −1.28% 2011 19 −4.46%
Source: 1902, 1923, 1959 & 1970, 1979, 1989, 2001, 2011