Theo Robinson struck two minutes from time to earn Derby a point and deny Eric Black his first win as caretaker boss of Blackburn.
Jordan Rhodes, Rovers' £8m summer signing, looked to have secured the points for the away side with a volley.
But the Rams snatched an equaliser when Robinson bundled home from close range in the 88th minute.
Blackburn remain unbeaten away from home in the league this season but have now gone five games without a win.
The point leaves Rovers 10th in the Championship with 17 points from 11 games, three points and four places better off than Derby.
Blackburn caretaker boss Black, who was put in charge of the first team after Steve Kean was ' forced to resign' at the end of last month , opted to relegate captain Danny Murphy to the bench.
They lacked a cutting edge in the opening half-hour and the closest they came was from a couple of Morten Gamst Pedersen free-kicks.
In the 34th minute the visitors took the lead as Colin Kazim-Richards chipped towards Pedersen, whose cushioned header found Rhodes in support and he waited for the ball to drop before firing home first time from 20 yards. It was his sixth goal of the season.
Derby served warning that they were far from a spent force in the game when Craig Bryson fired over from 10 yards before Paul Coutts curled an ambitious effort on to the roof of the net.
County continued to press but had to wait until late for the equaliser as the energetic Bryson drilled low and forced an impressive save from Paul Robinson, with his namesake following up to convert from a tight angle.
Derby boss Nigel Clough: "I said to the players that we have to be at 100% maximum to compete with these teams because of the quality they have.
"They had an absolutely brilliant goal out of nothing, which is what you get for an £8m striker I suppose. But in the end a draw was deserved if only for the second half, not the first.
"We were nowhere near good enough in the first half but we felt the pressure was building and in the last 20 minutes to half an hour we just about deserved it."
Blackburn caretaker boss Eric Black: "I haven't been told [how long the appointment will take], I'm not involved in the process.
"I'm employed by the club and I continue to give it my best shot to ensure the team prepares in the right manner and that is what I'll continue to do.
"I can't enlighten you really because I have no idea. I do know the the owners expect me to carry on preparing the team and I think I have enough experience to do that."
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Live Text Commentary
Full Time The referee blows for the end of the match.90:00 +2:50
Free kick awarded for a foul by Nathan Tyson on Morten Gamst Pedersen. Indirect free kick taken by Paul Robinson.90:00
Free kick awarded for an unfair challenge on Colin Kazim-Richards by Will Hughes. Morten Gamst Pedersen restarts play with the free kick.87:57
The assist for the goal came from Craig Bryson.87:57 Goal scored
Goal! - Theo Robinson - Derby 1 - 1 Blackburn Theo Robinson fires in a goal from close range to the bottom left corner of the goal. Derby 1-1 Blackburn.84:06
Nathan Tyson takes a shot. Paul Robinson makes a save. Colin Kazim-Richards takes a shot. Richard Keogh gets a block in. Mauro Formica produces a right-footed shot from deep inside the penalty box which goes wide of the left-hand upright.81:23 Substitution
Substitution Nathan Tyson comes on in place of James O'Connor.81:23
Richard Keogh takes a shot. Blocked by Gael Givet. Foul by Dickson Etuhu on Will Hughes, free kick awarded. Direct effort from the free kick comes in from Michael Jacobs. Michael Jacobs takes a outswinging corner to the near post, Bradley Orr manages to make a clearance.77:38
The ball is sent over by Michael Jacobs, clearance by Scott Dann.76:41
Handball decision goes against Jordan Rhodes. Adam Legzdins restarts play with the free kick.76:11
Jeff Hendrick gives away a free kick for an unfair challenge on Dickson Etuhu. Paul Robinson restarts play with the free kick.73:25 Substitution
Substitution Michael Jacobs joins the action as a substitute, replacing Conor Sammon.73:25
Dickson Etuhu challenges Theo Robinson unfairly and gives away a free kick. Direct effort from the free kick comes in from Craig Bryson.70:54
Morten Gamst Pedersen concedes a free kick for a foul on Jeff Hendrick. John Brayford takes the indirect free kick.69:57
Unfair challenge on James O'Connor by Colin Kazim-Richards results in a free kick. Jake Buxton restarts play with the free kick.68:13
Bradley Orr fouled by Conor Sammon, the ref awards a free kick. Paul Robinson takes the indirect free kick.67:28
Free kick awarded for a foul by Morten Gamst Pedersen on Jeff Hendrick. Indirect free kick taken by John Brayford.66:36 Substitution
Substitution Mauro Formica replaces David Dunn.65:56
Outswinging corner taken by Paul Coutts from the right by-line, Close range header by Jake Buxton goes wide of the left-hand upright.64:14
Jake Buxton takes the indirect free kick.
Booking Colin Kazim-Richards shown a yellow card.63:46
Colin Kazim-Richards takes a shot. Blocked by Jeff Hendrick. Colin Kazim-Richards challenges James O'Connor unfairly and gives away a free kick.60:58
Outswinging corner taken by Morten Gamst Pedersen from the left by-line, Scott Dann produces a header from inside the area that goes over the bar.60:19
Foul by Theo Robinson on Bradley Orr, free kick awarded. Indirect free kick taken by Scott Dann.56:42
Paul Coutts sends in a cross, save made by Paul Robinson.55:04
Short corner taken by Paul Coutts from the left by-line, Paul Coutts takes a shot from just inside the penalty box which clears the crossbar.54:08
Craig Bryson has an effort at goal from outside the area missing to the wide right of the goal.53:08
A cross is delivered by John Brayford, Headed effort from deep inside the penalty area by Jeff Hendrick misses to the left of the goal.49:17
Effort from deep inside the area by Craig Bryson clears the bar.48:46
The ball is swung over by Jordan Rhodes, save made by Adam Legzdins.47:39
Corner taken left-footed by Morten Gamst Pedersen from the right by-line, clearance made by Richard Keogh.47:07
Martin Olsson fouled by Craig Bryson, the ref awards a free kick. Free kick taken by Morten Gamst Pedersen.45:40
Corner taken left-footed by Morten Gamst Pedersen to the near post, Jake Buxton manages to make a clearance.45:01
The second half has started.45:00 +1:44 Half time
Half Time The ref blows to end the first period.45:00 +0:34
The official flags Jordan Rhodes offside. Richard Keogh takes the indirect free kick.43:27
Bradley Orr takes a shot. Save by Adam Legzdins.42:35
Free kick awarded for a foul by Conor Sammon on Scott Dann. Free kick taken by Paul Robinson.41:53
Morten Gamst Pedersen gives away a free kick for an unfair challenge on Paul Coutts. John Brayford takes the indirect free kick.40:51
Free kick awarded for a foul by Dickson Etuhu on Paul Coutts. John Brayford restarts play with the free kick.39:38
The referee penalises Colin Kazim-Richards for handball. Indirect free kick taken by Adam Legzdins.39:03
Bradley Orr takes a shot. Blocked by Jake Buxton.38:27
Outswinging corner taken right-footed by Paul Coutts from the right by-line, clearance by Bradley Orr.37:08
Free kick awarded for an unfair challenge on Will Hughes by Colin Kazim-Richards. Free kick taken by Jeff Hendrick.36:32
Shot from just outside the box by Theo Robinson goes over the crossbar.35:37
Paul Coutts takes a outswinging corner.33:54
Assist on the goal came from Morten Gamst Pedersen.33:54 Goal scored
Goal! - Jordan Rhodes - Derby 0 - 1 Blackburn Jordan Rhodes gets on the score sheet with a goal from the edge of the penalty area to the bottom left corner of the goal. Derby 0-1 Blackburn.31:58
Will Hughes challenges Colin Kazim-Richards unfairly and gives away a free kick. Direct effort from the free kick comes in from Morten Gamst Pedersen, save by Adam Legzdins. Morten Gamst Pedersen takes a inswinging corner to the near post, Theo Robinson makes a clearance.31:15
James O'Connor takes a shot. Blocked by Jason Lowe. Conor Sammon has a headed effort from close range and clears the bar.29:53
Will Hughes delivers the ball, Paul Robinson makes a save.26:58
Morten Gamst Pedersen sends in a cross.23:41
Inswinging corner taken right-footed by Paul Coutts from the left by-line, Jake Buxton takes a shot. Clearance by Morten Gamst Pedersen. Outswinging corner taken by Paul Coutts from the right by-line, Theo Robinson produces a header from inside the area that goes over the crossbar.23:05
The ball is crossed by Paul Coutts.21:55
Unfair challenge on Jason Lowe by Will Hughes results in a free kick. Martin Olsson takes the indirect free kick.19:33
Centre by Morten Gamst Pedersen, clearance made by Richard Keogh. Free kick awarded for a foul by Theo Robinson on Gael Givet. Morten Gamst Pedersen produces a cross, Scott Dann takes a shot. Save made by Adam Legzdins.16:11
Martin Olsson has a shot on goal from outside the box which misses right.15:03
Outswinging corner taken by Morten Gamst Pedersen from the left by-line.13:12
Conor Sammon is caught offside. Paul Robinson takes the indirect free kick.12:25
Conor Sammon delivers the ball, Theo Robinson produces a left-footed shot from deep inside the penalty area which goes wide of the left-hand post.10:37
Craig Bryson concedes a free kick for a foul on Morten Gamst Pedersen. Morten Gamst Pedersen takes the direct free kick.7:50
Morten Gamst Pedersen challenges Craig Bryson unfairly and gives away a free kick. Craig Bryson takes the direct free kick.5:18
Craig Bryson takes a shot. Blocked by Scott Dann. Conor Sammon is ruled offside. Free kick taken by Paul Robinson.2:11
Unfair challenge on David Dunn by John Brayford results in a free kick. Paul Robinson takes the indirect free kick.0:57
Free kick awarded for a foul by Conor Sammon on Bradley Orr. Scott Dann restarts play with the free kick.0:00
The match gets underway.
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