Each year, 50,000 permanent residency permits are allocated to people from countries that see relatively few emigrants depart for the United States.
Created in 1995, the lottery system aims to diversify the range of places from which people migrate to the United States.
It's a wildly popular programme, prompting millions of applicants -- a figure that has only grown in recent years.
But it has long been in the crosshairs of US Republican lawmakers, who control the House of Representatives and say it adds no value to the economy.
More From This Section
A final vote on the reforms is not expected before this summer, but if it passes, the diversity visas would vanish from next year.
Not that this year's crop of hopefuls knew, when they applied, that this might be their last chance.
To enter the draw for 2014, would-be immigrants needed to file a free online application in October 2012.
From 2130 IST today, the candidates will finally be able to check their status on the government website www.Dvlottery.State.Gov, using their personal confirmation number.
In the 2013 lottery, 7.9 million people, with 4.6 million spouses and children, submitted applications.
More than 18,000 Africans, more than from any other continent, got Green Cards through the lottery in 2012. Half of the lottery is reserved for applicants from the continent, which could now lose out.
Countries that sent more than 50,000 immigrants to the US in the past five years are excluded from the lottery.
The 2014 winners will be given interviews from October, where they will have to show proof of a high school diploma or at least two years of work experience, as required under the programme.