The loan for the teenager was confirmed directly after he signed a new four-and-a-half year deal at Stoke
The deal took place after the defender signed a new four-and-a-half year deal with The Potters, keeping him at the bet365 Stadium until 2022.
Souttar, a Scotland U19 international, returns to his native land to develop his game further with the hope of more first team minutes.
The teenager made his debut for Stoke City this season in the League Cup, however, is yet to feature since then.
"We're delighted to bring a talented young centre half like Harry to the club.
"He's a real prospect with high hopes of playing at the top level with Stoke City.
"I think the fact that he has just signed a new four-and-a-half year contract shows how highly they rate him and we look forward to continuing his development at Ross County."
Coyle will be hoping Souttar can play a big part in shoring up his defence with The Staggies currently sitting bottom of the Scottish Premiership with only 4 wins from 22.
The team make the trip to Motherwell tonight, seeking a win to draw level on points with 11th placed Partick Thistle.
Have something to tell us about this article?