|Date of birth||19 September 1905|
|Place of birth||Pinsk, Russian Empire|
|Year of aliyah||1933|
|Date of death||6 July 1994(aged 88)|
|Knessets||1, 2, 3, 4, 5, 6|
|Faction represented in Knesset|
Born in Pinsk in the Russian Empire (now in Belarus). His parents were Samuel Eisenstadt and Zipora Finfelstein. Osnia was educated at a heder and a high school in Danzig (now Gdańsk), before studying at the University of Königsberg. He returned to Danzig to work as a lawyer, and was a member of Habonim. In 1929 he became secretary of the central committee of the German branch of Poale Zion.
In 1933 he made aliyah to Mandatory Palestine and taught in a kibbutz high school. He was on the Mapai list for the 1949 elections, but did not win a seat. However, he entered the Knesset on 12 February 1951 as a replacement for Abba Hushi, who had resigned. He retained his seat in the July 1951 elections, and was re-elected in 1955, 1959, 1961 and 1965, by which time Mapai had formed the Alignment alliance. He lost his seat in the 1969 elections.
He died in 1994.
- Knesset Members in the First Knesset Knesset website
- Baruch Osnia on the Knesset website