Appingedam is a municipality and a city in the northeastern Netherlands. In 1327 Appingedam received city rights from the free Frisians of the Upstalboom near the East Frisian city of Aurich. Appingedam and Aurich still have friendly liaisons via a partnership called the Partnerschaft or Towns bond. Appingedam is located in the region Fivelingo, which in the Middle Ages was a part of Frisia.
In the Late Middle Ages, Appingedam, being a seaport, was an important trading competitor to Groningen. When Groningen received the staple right, Appingedam rapidly lost its trading position. Later on Delfzijl outstripped Appingedam with its newer and bigger seaport.