流体静力学(Hydrostatics)是连续介质力学的分支学科流体力学的子学科。

流体静力学研究流体（诸如气体和液体）静止时的现象以及相关力学行为的科学。这样的现象和行为可以用数学表达式来表述，称为流体静力学基本方程序。

Fluid statics or hydrostatics is the branch of fluid mechanics that studies incompressible fluids at rest. It encompasses the study of the conditions under which fluids are at rest in stable equilibrium as opposed to fluid dynamics, the study of fluids in motion. Hydrostatics are categorized as a part of the fluid statics, which is the study of all fluids, incompressible or not, at rest.