PENAS DE SAN PEDRO, a town of Spain, in the province of Albacete, 16 miles S.S.W. of the town of that name. It is surrounded with walls, and stands at the foot of a hill which is crowned by an almost impregnable fort. In the principal square stands the court-house and the prison, and in other parts of the town a parish church and schools. Chocolate, flour, soap, linen stuffs, &c., are made here; and some trade is carried on in wine, sheep, wool, &c. Pop. 7258.