诺森伯兰（郡）（英语：Northumberland，香港旧译诺森伯伦），英国英格兰最北、最东北的区，北靠苏格兰边区的边界，东临北海，拥有近80公里长的北海海岸线。莫珀斯是郡治。以人口计算，克拉姆灵顿是第1大镇（Town），布莱斯是第2大镇；布莱斯河谷是第1大自治市镇（Borough）。

2009年之前，诺森伯兰实际管辖6个非都市区，无单一管理区。2009年4月全郡改制为单一管理区，无论把它看待为名誉郡还是单一管理区，其人口和面积都分别是309,900和5,013平方公里。

Northumberland (RP pronunciation /nɔːˈθʌmbələnd/ local /nɔːˈθʊmbələnd/) is a county in North East England. The northernmost county of England, it borders Cumbria to the west, County Durham and Tyne and Wear to the south and Scotland to the north. To the east is the North Sea coastline with a 64-mile (103 km) long distance path. The county town is Alnwick although the county council is located in Morpeth (for the moment, as there are plans to move it to nearby Ashington). The northernmost point of Northumberland and England is located at Marshall Meadows Bay.