Lukashenko, 61, a swaggering former collective farm director once called Europe's last dictator by Washington, has led the landlocked eastern European country closely allied to Russia since 1994.
While imposing Soviet-style economic controls and jailing opponents, Lukashenko enjoys a degree of popular support for his folksy, outspoken style and his regime's durability, now making him Europe's longest-serving leader.
The result of the polls are in little doubt, particularly as the authorities have mustered a massive early vote, accounting for at least 36 per cent of the electorate, according to the country's electoral commission.
"Whatever happens, Belarus is flourishing," Vauchok, who came to the polling station in her wheelchair with her three-year-old daughter, told AFP. "Our system is established. I wouldn't like to be in the president's place as things are very complicated now. The main thing is for there not to be a war."
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Other voters expressed similar reasons to support Lukashenko.
"He has his own opinion and he does not bend to anyone's will, he protects the interests of his people," said retired university teacher Valentina Artyomovna as she bought pastries from her polling station's buffet, part of the authorities' attempt to create a "holiday atmosphere" for election day.
But Lukashenko has been known at times to publicly oppose Russian President Vladimir Putin.
The two leaders are currently locked in a spat over whether Russia can open an air base in Belarus as Moscow flexes its military might.
Facing the West, Lukashenko's incarceration of Belarussian political opponents has led to his international isolation and the imposition of Western sanctions on the country's officials following disputed polls in 2010.