The Serer people (Serer proper: Seereer or Sereer) are a West African ethnoreligious group and nation, "today scattered in several small states on the coast or pushed back into the woods of the interior, must be one of the oldest in Senegambia."They are the third-largest ethnic group in Senegal, making up 16% of the Senegalese population. They also reside in northern Gambia and southern Mauritania.
The Serer people originated in the Senegal River Valley, at the border of present-day Senegal and Mauritania, and moved south in the 11th and 12th century. They migrated again in the 15th and 16th centuries as their villages were invaded and they were subjected to religious persecution by Islamic forces. They have had a sedentary settled culture and have been known for their farming expertise and transhumant stock-raising.