Grenora is a city in Williams County, North Dakota in the United States. The population was 244 at the 2010 census.

Grenora was founded in 1916 at the end of a Great Northern Railway branch line that began in Stanley. The name comes from a combination of letters in the railway's name: GREat NOrthern RAilway. The tracks were in place until 2002, when Great Northern successor BNSF Railway filed for abandonment.