Peter Nicolaj Arbo (16 November 1768 – 12 September 1827) was a Norwegian-Danish timber trader and landowner.

He owned the estates Aldershvile, Lundbygård and Oremandsgaard in Denmark and Gulskogen Manor in Norway.

Founded by James Collett in Christiania in the 1690s, it had become the largest timber trading company in Norway and was also active in the shipping industry.

Arbo later moved to Copenhagen where he was also active in the timber industry.

In 1824, e acquired the estates Lundbygård and Oremandsgaard at Præstø on the southern part of Zealand.