V18 or V-18 may refer to:
*
De Havilland Canada V-18, a utility transport aircraft
*
ITU-T V.18, a textphone protocol
*
LFG V 18 Sassnitz, a German flying boat
*
V18 engine, an internal combustion engine
*
Vulcan V18
The Vulcan V18 is a semi-automatic rifle based on the ArmaLite AR-180, chambered in 5.56×45mm NATO. It was built using a modified carbon fiber AR-15 lower receiver coupled with a modified AR-180 upper receiver formed from heat treated SAE 413 ...
, a rifle
* V18, a family history of certain other specific conditions, in the
ICD-9 V codes
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