Norfolk County (pronounced IPA: ['noʊr:fəʊk]) is a city-status single-tier municipal government on the north shore of Lake Erie in southwestern Ontario. The county seat is Simcoe. The population in 2001 was 60,847.

Norfolk's history has been closely associated with that of the neighbouring Haldimand County. Norfolk was first created as a county in 1792. In 1800, Haldimand was formed from a portion of Norfolk. The two counties remained separate until 1974, when they were reunited as the Regional Municipality of Haldimand-Norfolk.

In 2001, Haldimand and Norfolk were separated again in a round of municipal restructuring based on a report by provincially-appointed special advisor Milt Farrow. Although both Haldimand and Norfolk use the name "county" for historical reasons, each is governed as a single municipality, with no lower-tier constituent municipalities, and thus neither is a true county. As part of the restructuring in 2001 Norfolk County was named the "Town of Norfolk." The newly-formed municipality's first by-law was to change the name to "Norfolk County."

In January 2005, the County unveiled a new coat of arms which included natural symbols associated with the county: Hooded Warblers, a Tulip Tree (Liriodendron tulipifera) and an Eastern Dogwood flower.

The first mayor of the County, Rita Kalmbach, was successed in 2007 by Dennis Travale.

Surrounding its many small communities is some the most fertile land in Ontario with a mild climate and lengthy growing season, the region has long been the centre of the 'Tobacco Belt', but many farmers have beguin the process of diversifying their crop selections to include Lavendar and Hazelnuts as tobacco consumption continues to decrease. The area also has an active greenhouse industry. Despite this, farmers have asked governments to reduce the financial losses of moving away from profitable tobacco operations. In 2004 the documentary film Tobacco's Last Stand was released which highlighted the effect on tobacco production on the region.

A significant natural feature of Norfolk is Long Point, a 40 kilometre (25 mi) spit of land projecting into Lake Erie. It plays an important part in eastern North American bird migration, and was designated a World Biosphere Reserve by UNESCO in 1986.