Falmouth Arwenack (Cornish: ) is an electoral division of Cornwall in the United Kingdom and returns one member to sit on Cornwall Council. The current Councillor is Laurie Magowan, a Labour member. The current division is distinct from those of the same name used from 2009 to 2013 and from 2013 to 2021, after boundary changes at the 2013 and 2021 local elections.
The current division represents the east of the town of Falmouth, including Swanpool, Gyllyngvase, Falmouth Docks and Pendennis Point.
Falmouth Arwenack represented part of the town of Falmouth, including Swanpool, Gyllyngvase, Falmouth Docks, the Falmouth campus of Falmouth University, and Pendennis Castle. The division was nominally abolished and recreated at the 2013 election but this had only minor effects on the ward. From 2009 to 2013, the division covered 71 hectares in total; after the boundary changes, it covered 195 hectares.