| Native Name: | Bezirk Oberelsaß |
| Conventional Long Name: | District of Upper Alsace |
| Status Text: | District of Alsace-Lorraine |
| Nation: | German Empire |
| Subdivision: | District |
| P1: | Haut-Rhin |
| Flag P1: | Flag of Haute-Alsace.svg |
| Year Start: | 1871 |
| Year End: | 1918 |
| S1: | Haut-Rhin |
| Flag S1: | Flag of Haute-Alsace.svg |
| Image Map Caption: | Upper Alsace district with its subdistricts in different colours (1890) |
| Capital: | Kolmar |
| Date Pre: | 1870–1871 |
| Stat Year1: | 1885 |
| Stat Area1: | 3.508 |
| Stat Pop1: | 462.549 |
| Stat Year2: | 1910 |
| Stat Area2: | 3.508 |
| Stat Pop2: | 517.865 |
| Political Subdiv: | 6 rural districts |
| Today: | France |
Oberelsaß (or Upper Alsace,) was the southern part of the historical region Alsace or Elsass. From 1871 to 1918, Bezirk Oberelsaß was a region (Bezirk) in the southern part of the province of Elsaß-Lothringen in the German Empire. The region corresponds exactly to the current French department of Haut-Rhin. Its capital was Colmar. It was divided into the districts (Kreise) of:
The flag of Oberelsaß is a yellow bar on a red field decorated on each side with three crowns. The combination of this flag with that of Unterelsaß forms the flag of modern Alsace.