Obama noted that 35 percent of people who enrolled through the federal marketplace are under the age of 35, just short of the Obama Administration's goal of 38 percent.
According to a fact sheet released by the White House, 28 percent of the enrollees are between 18 and 34 years old.
The latest figures show a good sign that the Obamacare is able to attract young adults into the insurance pool.
The president also seized the opportunity to target Republicans who have long been opposing to the Obamacare, accusing them of their "endless, fruitless repeal effort" against the healthcare overhaul.
"The point is, the repeal debate is and should be over. The Affordable Care Act is working. I know the American people don't want us to spend the next two-and-a-half years fighting settled battles," Obama said.
