Category:Members of the House of Commons of Northern Ireland for County Down constituencies

Constituencies:
 * Ards (1929–72)
 * Bangor (1969–72)
 * Down (1921–29)
 * East Down (1929–72)
 * Iveagh (1929–72)
 * Lagan Valley (1969–72)
 * Larkfield (1969–72)
 * Mid Down (1929–72)
 * Mourne (1929–72)
 * North Down (1929–72)
 * South Down (1929–72)
 * West Down (1929–72)