Legal separation (sometimes judicial separation, separate maintenance, divorce a mensa et thoro, or divorce from bed-and-board) is a legal process by which a married couple may formalize a de facto separation while remaining legally married. A legal separation is granted in the form of a court order. In cases where children are involved, a court order of legal separation often makes child custody arrangements, specifying sole custody or shared parenting, as well as child support. Some couples obtain a legal separation as an alternative to a divorce, based on moral or religious objections to divorce.

Legal separation does not automatically lead to divorce. The couple might reconcile, in which case they do not have to do anything in order to continue their marriage.