| Pfaffenthal | |
| Native Name Lang: | lb |
| Settlement Type: | Quarter |
| Mapsize: | 175px |
| Map Alt: | Map of Luxembourg City, with Pfaffenthal highlighted |
| Coordinates: | 49.6158°N 6.1319°W |
| Subdivision Type: | Country |
| Subdivision Name: | Luxembourg |
| Subdivision Type1: | Commune |
| Subdivision Name1: | Luxembourg City |
| Unit Pref: | metric |
| Area Footnotes: | [1] |
| Area Total Km2: | 0.3752 |
| Population As Of: | 31 December 2022 |
| Population Footnotes: | [2] |
| Population Total: | 1303 |
| Population Density Km2: | auto |
| Demographics Type1: | Nationality |
| Demographics1 Title1: | Luxembourgish |
| Demographics1 Title2: | Other |
| Demographics1 Info1: | 39.80% |
| Demographics1 Info2: | 60.20% |
Pfaffenthal (Luxembourgish; Letzeburgesch: Pafendall, pronounced as /lb/) is a quarter in central Luxembourg City, in southern Luxembourg. The quarter owes its name to the German words Pfaffen, meaning monk, and Tal, meaning valley, as the area was once administered by the Benedictine Abbey in Altmunster. During the Middle Ages, this site was popular with craftsmen and artisans, who used the Alzette River to aid in their work. The site is a strategically important gateway to Luxembourg City, and was thus repeatedly fortified by successive rulers from about the fourteenth to eighteenth centuries.
Since December 2017, Pfaffenthal is served by the Pfaffenthal-Kirchberg railway station, which connects it to the quarter of Kirchberg above through the Pfaffenthal-Kirchberg funicular.
, the quarter has a population of 1,303 inhabitants, with 39.80% being of Luxembourgish nationality.