| Conventional Long Name: | County of Champagne |
| Common Name: | County of Champagne |
| Era: | Middle Ages |
| Status: | Vassal state of Kingdom of France |
| Empire: | Kingdom of France |
| Government Type: | Feudal County |
| Year Start: | 690 |
| Event End: | County merged with the French Crown |
| Year End: | 1314 |
| P1: | Austrasia |
| S1: | France in the Middle Ages |
| Flag S1: | Flag of France (XII-XIII).svg |
| S2: | Champagne (province) |
| Flag S2: | Champagne-Ardenne flag.svg |
| Image Map Caption: | France in 1154 |
| Religion: | Roman Catholicism |
| Leader1: | Drogo |
| Leader2: | Louis X |
| Year Leader1: | 690-707 |
| Year Leader2: | 1305-1314 |
| Title Leader: | Count of Champagne |
| Today: | France |
The County of Champagne (Latin: Comitatus Campaniensis; French, Old (842-ca.1400);: Conté de Champaigne),[1] or County of Champagne and Brie, was a historic territory and feudal principality in France descended from the early medieval kingdom of Austrasia. The county became part of the crown lands due to the marriage of Queen Joan I of Navarre, who was the countess of Champagne, and King Philip IV of France.[2]
The county reached its peak as one of the richest and strongest of the French principalities during the rule of Henry I. The court of Champagne became a renowned literary center,[3] and the county hosted the Champagne fairs at their height. The countship passed to the French crown in 1314, forming the province of Champagne.[4]