North County refers to the northern part of San Diego County, the most populous region with this name.

It may also refer to:

• North County, another name for Massachusetts' Montachusett Region, located in the northern Worcester County
• North County, the northwestern corner of Alameda County, California containing the cities of Oakland and Berkeley
• North County, a name for the north part of St. Louis County, Missouri used by residents of the Greater St. Louis area of Missouri and Illinois
• North County, the northern part of Prince George's County, Maryland (part of the D.C. metro area)
• North County, Jefferson Territory, an historic county (1859–1861) in the extralegal U.S. territory of Jefferson (present-day Colorado)

• North County Dublin, an area north of Dublin, including some northern parts of County Dublin and southern parts of neighboring Fingal County

• • North Dublin (UK Parliament constituency), an historic UK Parliament constituency representing the area (1885–1922)
  • Dublin County North (Dáil constituency), an historic Irish Dáil Éireann constituency representing the area (1969–1981)

• North County Times, formerly the primary newspaper of northern San Diego County, sold in 2012