内尔斯海峡（英语：Nares Strait，丹麦语：Nares Strædet），是格陵兰和埃尔斯米尔岛之间的海峡，南连巴芬湾，北通林肯海。

该海峡得名于英国航海家乔治·斯特朗·内尔斯，1964年得到加拿大和丹麦双方的认可。

内尔斯海峡常年冰封，仅在每年8月前后的数周内破冰船可以通航。海峡内的汉斯岛为加拿大和格陵兰之间的争议领土。

Nares Strait (Danish:Nares Strædet) is a waterway between Ellesmere Island and Greenland that is the northern part of Baffin Bay where it meets the Lincoln Sea. From south to north, the strait includes Smith Sound, Kane Basin, Kennedy Channel, Hall Basin and Robeson Channel. During 1962–64 a 20 km by 10 km ice island drifted southward from the Lincoln Sea through the Nares and Davis Straits to the Atlantic Ocean (Labrador Sea). Nares strait has a nearly permanent current from the north, powered by the Beaufort Gyre, making it harder to traverse for ships coming from south.