齐格菲防线（德文: Der Westwall/Siegfried-Linie）是纳粹德国在第二次世界大战开始前，在其西部边境地区构筑的对抗法国马其诺防线的筑垒体系。

该项目由德国著名的建筑工程组织——托特机构负责，德国人称之为“西墙”或“齐格菲阵地”，其他国家多称之为“齐格菲防线”。构筑齐格菲防线的目的是为了掩护德国西线，并作为向西进攻的屯兵场以及支持进攻的重炮阵地。防线工程是1936年德国占领莱茵兰之后开始构筑的，至1939年基本建成。防线从德国靠近荷兰边境的克莱沃起沿着与比利时、卢森堡、法国接壤的边境延伸至瑞士巴塞尔，全长达630千米。

The original Siegfried Line (German:Siegfriedstellung) was a First World War line of defensive forts and tank defences built by Germany in northern France during 1916–17 as a section of the Hindenburg Line. In English the term "Siegfried Line" commonly refers to the "Westwall", the German term for a similar Second World War-era defensive line built further east during the 1930s opposite the French Maginot Line.