不伦瑞克（德语：Braunschweig）是德国下萨克森州东部的一个城市，居民数约为24.5万，是该州继汉诺威后的第二大城市和该州的一个地区中心。1918年该公国大公逊位以前，布伦瑞克是布伦瑞克公国的首都。此后直到1946年，它是布伦瑞克州的州府。1974年布伦瑞克县被撤销之前它是该县的县府。2004年12月31日下萨克森撤销地区级行政区划以前它是布伦瑞克地区的政府驻地。布伦瑞克是布伦瑞克上诉法院的驻地。城市周围的大城市有东北方约26千米远的沃尔夫斯堡、西方约56千米远的汉诺威和东方约80千米远的马格德堡。

Braunschweig (German pronunciation:[ˈbʁaʊ̯nʃvaɪ̯k]; Low German: Brunswiek [ˈbrɔˑnsviːk]), also called Brunswick in English, is a city of 252,768 people (as of 31 December 2015), located in the state of Lower Saxony, Germany. It is located north of the Harz mountains at the farthest navigable point of the Oker river, which connects to the North Sea via the rivers Aller and Weser. A powerful and influential centre of commerce in medieval Germany, Braunschweig was a member of the Hanseatic League from the 13th until the 17th century, and the capital of the state of Brunswick until its disestablishment in 1946. Today, Braunschweig is the second largest city in Lower Saxony and a major centre of scientific research and development.