Ligroin is the petroleum fraction consisting mostly of C7 and C8 hydrocarbons and boiling in the range 90‒140 °C (194–284 °F).

Products under the name ligroin can have boiling ranges as low as 60‒80 °C and may be called light naphtha.

[3] Ligroin was used to refuel the world's first production automobile, the Benz Patent-Motorwagen, on a long distance journey between Mannheim and Pforzheim.

Bertha Benz added ligroin to the vehicle at a pharmacy in Wiesloch, making it the first filling station in history.

The first functional diesel engine could also run on ligroin.