ISTANBUL — Two populists who have never held political office advanced to the final round in Tunisia’s presidential election on Tuesday, indicating fatigue among voters in the North African country with the established political forces, analysts said.

Tunisia’s election commission announced the top two vote-getters in Sunday’s election as Kaïs Saïed, a little-known law professor and constitutional expert, and Nabil Karoui, a media magnate currently in jail on charges of tax evasion and money laundering.

The two men received 18.4 percent and 15.6 percent of votes cast, respectively.

“The conclusion is that Tunisians are fed up with the political parities,” said Youssef Cherif, the head of Columbia Global Centers Tunis. “It shows a big gap between the population and these political parties that were never able to mass together people and have concrete results.”

The two men will go into a runoff election next month. The date has yet to be announced.

The vote on Sunday was Tunisia’s second free presidential election since the 2011 revolution that overthrew the country’s longtime strongman, Zine el-Abidine Ben Ali. His surprise ouster set off a string of uprisings across the Middle East that became known as the Arab Spring.