| Marja Lahti | |
| Birth Date: | 3 December 1901 |
| Birth Place: | Kymi |
| Death Place: | Helsinki |
| Nationality: | Finnish |
| Occupation: | Politician |
| Years Active: | 1954 – 1967 |
Ida Maria Marja Lahti (3 December 1901, Kymi – 19 April 1967) was a Finnish politician who served as Deputy Minister of Agriculture in the Virolainen Cabinet.
Lahti worked for a small farmers' federation in her local area, before being elected to the Parliament of Finland for the Agrarian League at the 1954 general election.[1] She remained a member until her death.[1] In parliament she served on the Economic Committee, the Grand Committee and the Banking Committee.[1] From 1964 to 1966 she served as second minister of Agriculture in the cabinet of Johannes Virolainen.[1] [2]