Oldendorf is a former municipality, now part of Melle, in the district of Osnabrück, in Lower Saxony, Germany.

Early Germanic settlements took place in the upper farming community in Westerhausen at around 700 BC on the south-facing slope of the Wiehen Hills.

[4] Due to the construction of a railroad track in 1855 and the installation of a stop in Westerhausen in 1879 the transformation from a farming community to an industrial location began.

There are some larger industrial enterprises in Oldendorf such as the office furniture manufacturer Assmann and the rubber rollers producer Westland Gummiwerke.

Primarily, Oldendorf is characterized by medium-sized businesses, rural agriculture and all other provision facilities which are typical for such a district.