The 1695 Siege of Namur or Second Siege of Namur took place during the Nine Years' War between 2 July and 4 September 1695. Its capture by the French in the 1692 siege and recapture by the Grand Alliance in 1695 are often viewed as the defining events of the war; the second siege is considered to be William III's most significant military success during the war.

Menno, Baron van Coehoorn was a Dutch soldier and engineer, regarded as one of the most significant figures in Dutch military history. In an era when siege warfare dominated military campaigns, he and his French counterpart Vauban were the acknowledged experts in designing, taking and defending fortifications.