Allaines is a commune in the Somme department in Picardie in northern France. Geography The commune is on the D43 departmental road about northeast of Saint-Quentin. Demography 1962 1968 1975 1982 1990 1999 2006 348 376 375 465 429 395 450 Starting in 1962: Population without duplicates… (More on Allaines)