Longman Dictionary of Contemporary English
electoral register
noun
EXAMPLES FROM CORPUS
▪ Go to the reference library and look up the electoral register for the last ten years or so.
▪ Is this one of the reasons why 1 million people are missing off the electoral register?
▪ The commission estimates the population on the basis of the electoral register - but is working with the artificially low 1991 registers.
▪ The other method for collecting facts about potential purchasers is through published lists - like the telephone directory or the electoral register.
▪ This register is not identical to the electoral register and includes foreigners resident in this country and others not entitled to vote.
Wiktionary
electoral register
n. (context British English) A list of all those people who are registered to vote in a particular locality
Usage examples of "electoral register".
They studied the photofit of the attacker, they sent off requests for information about Champ's whereabouts, checked if he had a criminal record and searched for him on the electoral register.
There is no Claud Thiveridge on the electoral register, or in any other official list, including the telephone accounts department, in the whole of Kent, Surrey, or Sussex.