Margaret Gray, who was in her late 70s, was killed shortly before 4pm on Monday after the car she was driving crashed into a wall at a house on the Moyarget Road at Mosside, outside Ballymoney.
Two others have been taken to Causeway Hospital in Coleraine.
They remain in a stable condition.
DUP MLA for North Antrim, Mervyn Storey said it was a tragic thing to have happened.
"It's a very sad situation. People out on a bank holiday, and we've had this tragic accident," he said.
"My thoughts and prayers are with the whole family."
COMMENT RULES: Comments that are judged to be defamatory, abusive or in bad taste are not acceptable and contributors who consistently fall below certain criteria will be permanently blacklisted. The moderator will not enter into debate with individual contributors and the moderator’s decision is final. It is Belfast Telegraph policy to close comments on court cases, tribunals and active legal investigations. We may also close comments on articles which are being targeted for abuse. Problems with commenting? firstname.lastname@example.org