Keith Lasley's late strike gave Motherwell only their second home win of the season as battling Ross County left Fir Park empty handed.
Rocco Quinn's superb long-range strike gave County a 17th-minute lead.
Michael Higdon's commanding header soon brought the hosts back on terms and Nicky Law's cool finish edged the Steelmen ahead just after the break.
A deflected Quinn drive levelled matters but Lasley fired the hosts' winner eight minutes from time.
Stuart McCall's side move into the Scottish Premier League's top four while County remain 10th.
Motherwell made the early running without really threatening Mark Brown's goal and the first attempt came from Quinn, who just cleared the crossbar with a delicate 20-yard chip.
Brown was tested, however, when Lasley's boot flicked on a Tom Hateley corner and the former 'Well keeper reacted superbly by palming clear.
And Derek Adams' men soon moved ahead with Quinn this time finding the net from outside the box.
The former Celtic and Kilmarnock midfielder ran at the Motherwell defence and, from 25 yards, unleashed a stunning strike past Lee Hollis off the underside of the bar.
The hosts' response was determined and eventually rewarded with Higdon's trademark header.
Brown did well to block Henrik Ojamaa's shot from six yards, but the ball was returned into the box by Chris Humphrey for Higdon to tower above the rest and nod into the top corner.
Intricate passing opened up the visiting defence again as Law squared for Jamie Murphy but he leaned back as he shot over.
The home side continued to dominate but sloppiness in the Steelmen's defence allowed Gary Glen in, Hollis narrowing the angle well to make the save.
Motherwell got the start to the second half that they wanted as Quinn conceded possession in midfield and Law was released down the left.
The midfielder took his time as he bore down on goal and passed the ball across Brown into the net from the corner of the six-yard box.
County were almost level through headers at corners, Ross Tokely having an effort saved before Colin McMenamin nodded over.
Referee Calum Murray ruled that Hollis had taken the ball and not the man after Mark Fotheringham went down in the Motherwell box and within moments Tom Hateley tested Brown with a well-struck free-kick.
The visitors continued to press and equalised when Quinn's rebound shot, after his initial effort had been blocked, took a nick off a defender on its way past Hollis.
A draw looked on the cards until Murphy's blocked shot fell for Lasley on the edge of the box and the Motherwell captain tucked the ball past Brown.
There was still time for County to try and steal a point but Hollis made a terrific reaction save to keep out Scott Boyd's injury-time header and McMenamin could only shoot into the side netting in the aftermath.