Legal mobilisation is the employment of legal processes and resources by activist groups or individuals in order to achieve specific social and political outcomes. It is a form of social mobilisation that focuses on successfully pleading strategic litigation cases before the courts.

The mobilisation of the law may involve multiple stakeholders, including advocacy groups, marginalised communities, non-governmental organisations, independent government agencies, and lawyers.

An early definition of legal mobilisation by Frances Kahen Zemans describes the law as being mobilised when "a desire or want is translated into a demand as an assertion of one's rights".

Legislative activity creates an opportunity for legal mobilization. The courts become particularly relevant when petitioners have grounds to file suit.