A search is underway for a missing Hamilton man who police say they have concerns for.

Darrell Wilson, 54, was last seen on Victoria Street around 2pm on Monday.

Police and others were searching the local area and a boat was being used to search the Waikato River.

Mr Wilson was last seen wearing dark coloured shorts, a black t-shirt with imprinted circles on it, and a long-sleeved grey jersey.

Anyone with information is urged to contact Hamilton Police on (07) 858 6200.