This is a list of councillors and aldermen elected to the London County Council from 1937 to 1949. Elections of all councillors on the London County Council were scheduled to be held every three years. Following the outbreak of the Second World War, the elections due in 1940 were cancelled. Vacant seats were filled by co-option under the terms of the emergency Local Elections and Register of Electors (Temporary Provisions) Act 1939 until the electoral cycle was resumed in 1946.