Allaines is a commune in the Somme département in the Picardy region of France. Geography On the D43 departmental road, around 21 miles northeast of Saint-Quentin Demography 1962 1968 1975 1982 1990 1999 348 376 375 465 429 395 Census count starting from 1962 : Population without double counting… (More on Allaines)