Dalby (pronunciationⓘ) is a locality and short-lived (11th century) former Latin Catholic diocese situated in Lund Municipality, Skåne County, Sweden with 6732 inhabitants in 2019.

In 1060 the Danish King Svend Estridsen initiated the creation of a religious centre in Dalby, and possibly also constructed his royal residence there.

[2] From 1060, Dalby was a bishopric, on territory split off from the Roman Catholic Diocese of Roskilde, under the bishop Egino, appointed by the German Archbishop Adalbert of Bremen.

But as early as 1066 the English anti-bishop Henrik was enthroned in Lund, probably elected by the people and the clergy.

Until the Protestant Reformation in Denmark in 1536, Dalby retained some importance as the site of an Augustinian monastery and a demesne of the Danish Crown.