The ceremony, held at the Commercial Vehicle Operators Show in Birmingham, recognises the best vans in the commercial sector each since its launch in 2004.
The Nemo picked up the award in the Light Van category for, according to the judges, a large load area and practical design for business.
John Fife, the editor of iVan, said, "Unusually in this sector the Nemo is purpose designed as a van and is full of practical features to suit business usage. It also benefits the operator with a surprisingly big load area and space for two burly crew, yet it has a very small footprint on the road."
Meanwhile, the Dispatch van won the Compact Van category thanks to its comfort, high equipment levels and off-road capabilities.
Robert Handyside, Citroen’s commercial vehicle operations manager, said: "We are delighted that the iVan Awards 2010 have recognised the excellence and practicality offered by both Nemo and Dispatch.
"These successes, in the independently judged iVan Awards, are a very valuable endorsement for the Citroën LCV range."