Grave coercion is a crime defined in the Revised Penal Code of the Philippines. It is committed when a person, without authority of law, prevents another from doing something not prohibited by law, or compels him/her to do something against his/her will, whether it be right or wrong, through violence, threats, or intimidation. The penalty for grave coercion is arresto mayor and a fine not exceeding 500 pesos.

Grave coercion is distinguished from other crimes such as robbery and threats. For example, if the taking of property is not with the intent to gain but to prevent the doing of an act, it is coercion and not robbery. If the harm to be done is direct and immediate, it is coercion, but if the harm is to be inflicted later, it is threats.

Grave coercion is also distinguished from other crimes related to the exercise of suffrage or religion. If the coercion relates to the exercise of suffrage, such as preventing a voter from voting, or the exercise of religion, such as pointing a gun at another to prevent him/her from making the sign of the Cross, the penalty is higher.

Examples of grave coercion include preventing another person from doing something not prohibited by law, or compelling him/her to do something against his/her will, through violence, threats, or intimidation. However, it is not considered grave coercion when the violence is employed to seize anything belonging to the debtor of the offender.