Jisung Eom broke the deadlock and gave Swansea the lead against the run of play in the 78th minute.
Can you spot yourself in our fan gallery?
The Rams have another quick turnaround in fixtures as they play under the floodlights at Pride Park Stadium for the second week in a row when they host promotion-chasing Burnley on Tuesday 8th April (7:45pm kick-off).
1. Swansea City v Derby County
Derby County were consigned to their first loss in five games as Swansea City came out on top in a narrow 1-0 defeat for John Eustace's side at the Swansea.com Stadium on Saturday. | Gareth Williams/AHPIX LTD
2. Swansea City v Derby County
Derby County were consigned to their first loss in five games as Swansea City came out on top in a narrow 1-0 defeat for John Eustace's side at the Swansea.com Stadium on Saturday. | Gareth Williams/AHPIX LTD
3. Swansea City v Derby County
Derby County were consigned to their first loss in five games as Swansea City came out on top in a narrow 1-0 defeat for John Eustace's side at the Swansea.com Stadium on Saturday. | Gareth Williams/AHPIX LTD
4. Swansea City v Derby County
Derby County were consigned to their first loss in five games as Swansea City came out on top in a narrow 1-0 defeat for John Eustace's side at the Swansea.com Stadium on Saturday. | Gareth Williams/AHPIX LTD