Leges Genuciae (also Lex Genucia or Lex Genucia de feneratione) were laws proposed in 342 BC by plebeian consul Lucius Genucius.
These laws banned lending that carried interest (however it soon became disused), holding two magistrates at the same time or repeated holding of office within 10 years. Finally they required one consul to be plebeian and also permitted both plebeian consuls (first such case was in 172 BC). However all of the restrictions began to be disused except the last one.