领空，（英：Airspace）是指主权国家领陆和领海上空的空气空间，国家领土的组成部分。《巴黎航空公约》和《国际民用航空公约》规定，国家对其领土上空的空气空间享有绝对主权。

领空不包括外层空间，国际上对于领空的最大高度未有一致意见。国际航空联合会以100公里高度作为地球大气层与外层空间的分界，称为卡门线，不过这个定义不具法律约束力。

Airspace is the portion of the atmosphere controlled by a country above its territory, including its territorial waters or, more generally, any specific three-dimensional portion of the atmosphere. It is not the same as aerospace, which is the general term for Earth's atmosphere and the outer space in its vicinity.