"I will travel to Donbas on my first presidential visit," he said at a press briefing at his campaign staff on Sunday.
Poroshenko thanked "thousands of residents of Crimea and hundreds of thousands of residents of Donbas" for taking part in the polls.
"We can say with confidence and determination: the whole of Ukraine cast its ballots. It is the choice made by the whole of Ukraine," Poroshenko said.
Poroshenko said that an antiterrorist operation would be more effective in eastern Ukraine: “The antiterrorist operation will change dramatically, will be more effective and shorter. Equipment and payments of forces will change, too.”