科里奥利力（法语：force de Coriolis；德语：Corioliskraft；英语：Coriolis Force；简称：科氏力）是对旋转体系中进行直线运动的质点由于惯性相对于旋转体系产生的直线运动的偏移的一种描述。此现象由法国著名数学家兼物理学家古斯塔夫・科里奥利发现，因而得名；同时由于这种力在地球自转下产生，因此又称为「地转偏向力」。

地转偏向力使北半球的风向右偏转，偏南风逐步转为西至西南风，偏北风则渐转东至东北风；南半球则相反，风会向左偏转，偏北风渐转为西至西北风，而偏南风则逐步转为东至东南风。而在赤道上，地转偏向力则失效。此现象主导地球的高压区和低压区的空气流向，北半球高压区以顺时针方向旋转、低压区（及热带气旋）逆时针旋卷；南半球则是反方向，高压区逆时针旋转，低压区则是顺时针。 地球自转产生的科氏力的数值是很小的，因此其效应只有在较大的时空尺度上才比较明显，对于马桶或水槽漩涡旋转方向之类的小尺度、短时间过程的影响很不明显。

In physics, the Coriolis force is an inertial force (also called a fictitious force) that acts on objects that are in motion relative to a rotating reference frame. In a reference frame with clockwise rotation, the force acts to the left of the motion of the object. In one with anticlockwise rotation, the force acts to the right. Though recognized previously by others, the mathematical expression for the Coriolis force appeared in an 1835 paper by French scientist Gaspard-Gustave de Coriolis, in connection with the theory of water wheels. Early in the 20th century, the term Coriolis force began to be used in connection with meteorology. Deflection of an object due to the Coriolis force is called the 'Coriolis effect'.