Longkümer is an Ao Naga surname. Notable people with the surname include:
Imtikümzük Longkümer (1967–2018), Indian politician Macnivil (Akaba Martin Longkümer) (born 1992), musician Sharingain Longkümer (born 1981), Indian politician Temjen Imna Along (Temjen Imna Along Longkümer) (born 1980), Indian politician Temsüyanger Longkümer, artist
See also List of Naga surnames