Only a third of the public is aware that Congress repealed ObamaCare's individual mandate, according to a new poll released Friday.

Of those surveyed by the Kaiser Family Foundation, 36 percent said they're aware Congress repealed the requirement that most have insurance or pay a tax penalty, while 46 percent incorrectly said it has not been repealed.

The rest — 18 percent — were not sure.

Congress repealed ObamaCare's mandate through tax reform at the end of last year.

The repeal doesn't take effect until 2019, however.

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The poll also found that, overall, voters consider health care to be the most important issue for congressional candidates to address in 2018.

Among registered voters polled, 29 percent said health care is the most important issue for candidates to discuss, followed by the economy and jobs at 27 percent, and immigration and North Korea at 24 percent.

The issue of health care becomes less important for voters in battleground states, however.

Only 21 percent of registered voters in those states said health care is the most important issue for candidates to discuss. The economy and jobs ranked the highest for voters in battleground states, with 34 percent saying that's the most important issue for candidates to address.

North Korea and immigration follow at 23 percent and 22 percent, respectively.

The poll was conducted from Jan. 16-21 among 1,215 adults and has a margin of error of plus or minus 3 percentage points.