Weregild (also spelled wergild, wergeld (in archaic/historical usage of English), weregeld, etc.), also known as man price (blood money), was a tradition in Germanic law whereby a monetary value was established for a person's life, to be paid as a fine or as compensatory damages to the person's family if that person was killed or injured by another.

The compound noun weregild means "remuneration for a man", from Proto-Germanic *wira- "man, human" and *geld-a- "retaliation, remuneration". In the southern Germanic areas, this is the most common term used to mean "payment for killing a man" (Old High German werigelt, Langobardic wergelt, Old English wer(e)gild), whereas in the North Germanic areas, the more common term is Old Norse mangæld, with the same meaning. Wolfgang Haubrichs argues that wergild is "undoubtably a West Germanic word" which spread throughout the various Germanic-speaking peoples, but which in the north was replaced with mangæld since the meaning of the element "wer-" had been forgotten; comparable replacement words such as wider-geld ("repayment") are known from the south.

Several alternative terms are also found, such as leodis ("man") and leodardi ("violation of a man") in the Lex Salica, and the short from wer(e) in Old English. Both of these terms appear to derive from a word meaning the subject harmed, with a shift to meaning the payment for that harm.

A weregild or wergeld was a defined value placed on every man graded according to rank, used as a basis of a fine or compensation for murder, disablement, injury, and certain other serious crimes against that person. It was assessed from the guilty party, payable as restitution to the victim's family.

The weregild was codified, for example, under Frankish Salic Code.

Weregild payment was an important legal mechanism in early Germanic society; the other common form of legal reparation at this time was blood revenge. The payment was typically made to the family or to the clan. Similar to the way a payment was made to family, it was also a family's or kin group's responsibility to ensure the payment for the wrong committed, especially if the offender is unable to cover the cost of the offense himself.

No distinction was made between murder and manslaughter until these distinctions were instituted by the re-introduction of Roman law in the 12th century.

Payment of the weregild was gradually replaced with capital punishment due to Christianization, starting around the 9th century, and almost entirely by the 12th century when weregild began to cease as a practice throughout the Holy Roman Empire.