Analysts say the polls, with Sisi loyalists heavily favoured to emerge the big winners, will serve to appease Egypt's backers in the West who see the president as a rampart against jihadist violence despite concerns over repression that has eliminated any meaningful opposition.
A new parliament will be in place "by the end of the year", according to Ayman Abbas, head of the electoral commission.
The polls had initially been scheduled for early 2014 but were repeatedly delayed on legal grounds amid charges from rights groups of repressive measures during a crackdown on the Islamist opposition.
The constitutional court had ruled in March that part of the electoral law was unconstitutional, prompting the latest delay before the electoral commission began work on setting the new dates.
