The 1948 Preis von Ostschweiz-Erlen was a Formula One motor race held on 8 August 1948 over 50 laps of a street circuit in Erlen, Switzerland.

Emmanuel de Graffenried, driving a Maserati 4CL, started from pole, set fastest lap and won the race.

Rudi Fischer was second in a Simca Gordini Type 11, and Walter Wüst was third in a Cisitalia D46-Fiat.

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