The show, based on the BBC series of the same name, stars Sam Witwer, Meaghan Rath and Sam Huntington as a vampire, a ghost and a werewolf who share an apartment.
The show's series premiere was the most-watched scripted series debut for Syfy since Battlestar Galactica debuted in 2005, according to the network.
"Being Human has proven to be a winner for Syfy on all fronts," said Syfy's Mark Stern.
He added: "Using the original format as inspiration, showrunners/writers Jeremy Carver and Anna Fricke - along with a superlative team of writers, cast and production - have created an amazing, compelling series in its own right".
Witwer recently revealed that his character Aidan will go through dark times later this season.
The BBC ordered a fourth series of the UK Being Human earlier this week.