Aubin-Saint-Vaast – Aubrometz – Auchel – Auchy-au-Bois – Auchy-lès-Hesdin – Auchy-les-Mines – Audembert – Audincthun – Audinghen – Audrehem – Audresselles -Audruicq -Aumerval – Autingues – Auxi-le-Château -Averdoingt – Avesnes – Avesnes-le-Comte – Avesnes-lès-Bapaume – Avion – Avondance – Avroult – Ayette – Azincourt – Bailleul-aux-Cornailles – Bailleul-lès-Pernes – Bailleul-Sir-Berthoult – Bailleulmont – Bailleulval – Baincthun – Bainghen – Bajus – Balinghem – Bancourt – Bapaume – Baralle – Barastre – Barlin – Barly – Basseux – Bavincourt – Bayenghem-lès-Eperlecques.