Ness (Scottish Gaelic: Nis) is the northernmost part of the Isle of Lewis, a community consisting of about 16 villages, including Lionel, Habost, Swainbost, Cross, North and South Dell, Cross Skigersta, Skigersta, Eorodale, Adabroc, Port of Ness, Knockaird, Fivepenny and Eoropie. It was the most north-westerly community in the European Union, when the United Kingdom was a member. Its most northerly point is the Butt of Lewis. The name Ness derives from the old Norse for headland and many of the other place names in the area also have a Norse origin.

In the medieval period, the Ness area was dominated by the Clan Morrison, including the island of Dùn Èistean where numerous archeologically remains have been discovered.

In 1862, 31 fisherman from Ness were lost during a storm in what was named the 'Great Drowning of Ness'. The incident resulted in 24 widows and 71 children being left without fathers.

In 1919, a Ness boat builder called John F. Macleod from Port saved 40 lives following the sinking of H.M.Y. Iolaire by managing to take a line to shore.

The Ness Historical Society, the first historical society to be established in the Outer Hebrides, was established in 1977.

Since 2007, Ness is part of the Galson Estate, which is owned by Urras Oighreachd Ghabhsainn (Galson Estate Trust) which is managed by 10 local trustees elected by the community. The official hand-over took place on 12 January 2007.

In 2011, the small school at Cross closed due to declining rolls, latterly having only 19 pupils. The buildings, including Ness Hall have now been taken over by Comunn Eachdraidh Nis, the Ness Historical Society as a museum.

Scottish Gaelic is the language of the community with 75% being able to speak it.^{[citation needed]} Peat cut from the moor, is used as a fuel for cooking and heating in many homes, but its use is on the decline. The 2001 Census results show a resident population of just under 1,000. In 1831 Ness had a population of just over 3,000.