Partick Thistle lead Ross County at the half-time interval thanks to Kris Doolan's left foot strike.
The visitors arrived looking for their first win of the season after being held to a draw last weekend and started the game on the front foot.
Their early pressure was rewarded when Doolan handed them the lead after 18 minutes and they looked relatively comfortable at the break.
Orhan Mustafi had the best chance for the hosts, but his goal-bound shot was well blocked just before half time.