- Source: Oskari Lahdensuo
- Daftar anggota Parlemen Finlandia
- Oskari Lahdensuo
- Jalo Lahdensuo
- Fredrik Vilhelm Lagerstedt
- List of Finnish MPs
- Speaker of the Parliament of Finland
- List of members of the Parliament of Finland, 1919–1922
- Finnicization
- Ingman II cabinet
- List of members of the Parliament of Finland, 1922–1924
- List of Cabinet Ministers from Finland by ministerial portfolio
Juho Oskari Lahdensuo (22 June 1864 – 3 July 1935; surname until 1906 Lagerstedt) was a Finnish farmer and politician. He was born in Lapua. He was a Member of the Diet of Finland from 1904 to 1905. Lahdensuo was a Member of the Parliament of Finland from 1910 to 1919, representing the Agrarian League. He was the son of Fredrik Vilhelm Lagerstedt and the elder brother of Jalo Lahdensuo.