Chimillas is a municipality in the province of Huesca, in the Aragon region of northeastern Spain. It lies in the comarca of Hoya de Huesca, a broad, gently rolling depression in the Ebro basin, close to the city of Huesca itself.
As of 2023, the municipality had a population of 396 inhabitants, making it a small rural settlement typical of the scattered villages that surround the provincial capital. Its economy and daily life are tied to the surrounding agricultural landscape of the Hoya de Huesca.
Chimillas is one of many minor municipalities in Aragon whose administrative identity is defined at the provincial level, under the autonomous community of Aragon. The village sits within easy reach of Huesca, which provides the nearest major services and transport connections.