Lillesand Town- and Maritime Museum is a museum of cultural history of Lillesand in Aust-Agder County, Norway. The museum, established in 1970, was a time consolidated with AAKS, Aust-Agder historical center, but from 2012 back to the local government; Lillesand municipality. Anne Sophie Hoegh-Omdal has been employed as a museum director since 1 May 2010.
The farm in the town is often called Carl Knudsen-gården (Carl Knudsen's house) after the last owner's father. Last owner was Thyra Mercedes Knudsen, who died childless in 1963. She let Lillesand municipality have right of first refusal to the buildings on the property and it was converted into a museum.
A separate department of the museum is a customs museum in the old customs house, located in the harbor nearby.