The Law of Uppland (Swedish: Upplandslagen; Latin: Codex iuris Uplandici) was the law that applied in Uppland, Sweden, from 1296 to the beginning of the 1350s.
It was drafted by a Royal commission, enacted at the three Folkland Things, and given Royal assent in 1296. The Law of Uppland became the law of the land, not only for the province of Uppland it created, containing the three Folklands and Roden, but also for Gästrikland. The law contained eight law codes: The Church, King's, Heritance, Freeman's, Land, Merchant's, Neighborhood, and Thing codes. Courts were held in each Hundred and each Folkland. There were no public prosecutors, and no material difference between criminal and civil cases existed. Suits in law would be initiated by the parties. Legal proceedings were of three kinds: trial by eyewitnesses, trial by compurgation and trial by jury.