Hemsworth, who is engaged to singer-actress Miley Cyrus, has called the dating reports "baseless" and "false", reported E! Online.
"The story of Liam Hemsworth and January Jones is entirely fabricated by US Weekly. There is no truth whatsoever to this tabloid fiction," the actor said.
Over the past year, there have been plenty of rumours about turmoil in Hemsworth's relationship with Cyrus, but so far the two are happily engaged.