| Type: | Ortsgemeinde |
| Image Coa: | Wappen welschbillig.svg |
| Coordinates: | 49.8558°N 6.5675°W |
| Image Plan: | Welschbillig in TR.svg |
| State: | Rheinland-Pfalz |
| District: | Trier-Saarburg |
| Verbandsgemeinde: | Trier-Land |
| Elevation: | 290 |
| Area: | 37.08 |
| Postal Code: | 54298 |
| Area Code: | 06506 |
| Licence: | TR |
| Gemeindeschlüssel: | 07 2 35 501 |
| Divisions: | 5 Ortsteile |
| Website: | www.welschbillig.de |
| Mayor: | Dieter Bretz[1] |
| Leader Term: | 2019 - 24 |
| Party: | FWG |
Welschbillig is a municipality in the Trier-Saarburg district, in Rhineland-Palatinate, Germany.