No, Oscar award was never won by any Marathi movie
Jhanak Jhanak Payal Baaje won the Filmfare Award for Best Movie in 1957.
The movie was critically panned, which is one of the reasons.
Yea, Sounder won a award for eating that hamburger fast as hell!
Jagriti won the Filmfare Award for Best Movie in 1956.
Sujata won the Filmfare Award for Best Movie in 1960.
Guide won the Filmfare Award for Best Movie in 1967.
Upkar won the Filmfare Award for Best Movie in 1968.
Aradhana won the Filmfare Award for Best Movie in 1970.
Anand won the Filmfare Award for Best Movie in 1972.
Be-Imaan won the Filmfare Award for Best Movie in 1973.
Anuraag won the Filmfare Award for Best Movie in 1974.