Egypt's state-run news wire MENA said embassies and consulates in 139 countries will be open for two days of voting.
The vote is staggered, with polling in half of Egypt's governorates set to start tomorrow. The election will take place in two phases, concluding in early December.
President Abdel Fattah el-Sissi called on Egyptians to vote in a televised speech today.
"Line up in front of polling stations and plant with your votes the hope for a bright tomorrow for our new Egypt," he said.
Interior Ministry spokesman Abu Bakr Abdel-Karim said they will be joined by 180,000 police.
Few candidates have broad recognition or clear platforms, and most have a pro-government bent.
"There are no big issues being discussed because that's not the nature of it ... It's not an election of ideas," said Khaled Dawoud, a prominent member of the center-left Dostour party. "They are competing over who will be the new president's men."
The government's supporters reject the criticism from opposition political parties, insisting the field is wide open for anyone who wants to compete.
The vote will mark the final step in what has been billed as a transition to democracy. But critics say the next legislature is likely to be a rubber-stamp body that further solidifies the power of el-Sissi, a former general who led Morsi's overthrow.
Egypt has been without a parliament since it was dissolved by a court ruling in 2012.
