More than 200,000 people attend a folk art festival during the first month of the Chinese New Year in Baofeng county, Henan province. [File photo]

China's most populous province, Henan, will become the first province with more than 100 million permanent residents later this month, giving it a population triple the size of Canada's - in 1/60 the area.

A largely rural and less developed province in Central China, Henan is the source of many of the country's migrant workers who have helped transform the nation into the world's third-largest economy.

Henan's population soared from 40 million in the 1950s to about 90 million in the 1990s, and while it will soon hit 100 million, the rise has slowed notably over the past two decades, the Population and Family Planning Commission of Henan said on Sunday.

The commission said that without the family planning policy introduced three decades ago, Henan's population would now have an estimated 33 million more people, and its population would have hit 100 million 13 years ago.

Henan governor Guo Gengmao earlier said that the province would stick to the family planning policy.

"Any change in the policy would seriously affect our population control target and hinder the development of the province," he told a provincial population working conference in June.

Henan aims to keep its population under 101 million by the end of the year and under 107 million by the end of 2020.