Lerma is a municipality with 862 (as of 31 December 2012) inhabitants in the province of Alessandria (AL ), Region Piedmont. The neighboring municipalities are Bosio, Casaleggio Boiro, Castelletto d' Orba, Montaldeo, Silvano d' Orba and Tagliolo Monferrato.
The village lies at an altitude of 293 m above sea level. The municipality covers an area of 14.5 km ².
In Lerma vines of Dolcetto for the Dolcetto d' Ovada, a red wine are grown with DOC status. The berries of the grape varieties Pinot Noir and / or Chardonnay may be processed for sparkling wine Alta Langa. The variety Barbera finds its way into the red wine Barbera del Monferrato.