Hibs moved up to fifth place in the Scottish Premiership thanks to a sixth goal of the season from Liam Craig.
The midfielder arrowed a first-time shot into the top corner from 16 yards on 69 minutes at Firhill.
Partick Thistle striker Kris Doolan headed narrowly over and wasted a one-on-one opportunity with a tame shot straight at Ben Williams.
The Hibs keeper then kept out a close-range effort from Christie Elliot and tipped away a Ross Forbes shot.
Craig's impressive finish was just Hibs' eighth goal in nine league outings, pushing the Edinburgh side level on 14 points with fourth-placed Aberdeen.
The defeat means the Jags are still without a victory at home in the Premiership and have gone six games since their last win.
Four minutes into the match the hosts earned an indirect free-kick on the visitors' six yard line after Williams collected a back-pass, but Sean Welsh's powerful drive was blocked by Michael Nelson.
Moments later, Thistle keeper Scott Fox had to rely on some deft footwork to prevent Paul Heffernan latching onto a long ball.
Stuart Bannigan fired a ball into the Hibs penalty area for Kallum Higginbotham to run onto, but Paul Hanlon made a surgically-precise tackle to clear the danger.
Soon after, Higginbotham drilled in a 25-yard half-volley that Williams did well to contain.
Hibs' best chance of the first period came from a Heffernan shot from the edge of the Thistle penalty area that drifted two yards wide of Fox's right-hand post.
As the interval neared, Thistle full-back Stephen O'Donnell raced down the right and curved in a cross that Doolan leapt to meet, but his header flew just too high.
Five minutes after the restart, Doolan was allowed to race onto O'Donnell's long ball, but the striker could not take advantage of a free run at goal as his shot was comfortably saved by Williams.
Welsh had a penalty claim waved away by referee Kevin Clancy and Higginbotham should have done better with a shot that cut across the Hibs penalty area.
However, it was the visitors who finally opened the scoring in the 69th minute when substitute Abdellah Zoubir cut the ball across the 18-yard line for Craig to blast high into the net.
With 10 minutes remaining, a corner for Thistle drifted across the face of goal, but no Jags jerseys were on hand to profit.
The home side kept pressing and Elliot's shot from six yards was stopped by the foot of Williams at full-stretch.
The Hibs captain had to get back to his feet quickly and was alert enough to spring up to his left and push away a 20-yard strike from Forbes.
The same player was over a free-kick in added-on time but delivered something of an anti-climax for the home fans, the ball sailing over the bar and with it any hope of salvaging a point.
Partick Thistle 01 Fox 05 Muirhead 02 O'Donnell 03 Sinclair 06 Balatoni 11 Lawless (Elliott - 64' ) 04 Welsh Booked 19 Osbourne 08 Bannigan (Baird - 73' ) 23 Higginbotham (Forbes - 79' ) 09 Doolan Substitutes 13 Gabriel 17 Baird 12 Gallacher 10 Forbes 14 Elliott 22 Fraser 07 Craigen Hibernian 01 Williams 04 Hanlon 03 McGivern 05 Nelson 16 Stevenson Booked 10 Craig 20 Taiwo (Zoubir - 63' ) 08 Robertson (Stanton - 90' ) 38 Thomson 24 Heffernan 14 Collins (Tudur Jones - 63' ) Substitutes 26 Stanton 17 Tudur Jones 22 Mullen 21 Murdoch 09 Vine 06 McPake 27 Zoubir
Ref: Kevin Clancy