Yorkshire ( YORK-shər, -⁠shihər) is a historic county in Northern England and the largest by area size in the United Kingdom. Because of its large area in comparison with other English counties, functions have been undertaken over time by its subdivisions, which have also been subject to periodic reform. Throughout these changes, Yorkshire has continued to be recognised as a geographic territory and cultural region.

The name is familiar and well understood across the United Kingdom and is in common use in the media and the military, and also features in the titles of current areas of civil administration such as North Yorkshire, South Yorkshire, West Yorkshire and the East Riding of Yorkshire.

Within the historic Yorkshire borders are large stretches of upland countryside, including the Yorkshire Dales, North York Moors and Peak District national parks. Yorkshire has been nicknamed "God's Own Country" by its people.

The emblem of Yorkshire is the White Rose of the English royal House of York, and the most commonly used flag representative of Yorkshire is the white rose on a blue field which, after nearly fifty years of use, was recognised by the Flag Institute on 29 July 2008. Yorkshire Day, held annually on 1 August, is a celebration of the general culture of Yorkshire, ranging from its history to its dialect.

Yorkshire is covered by different Government Office Regions. Most of the county falls within Yorkshire and the Humber while the extreme northern part of the county, such as Middlesbrough, Redcar, Holwick and Startforth, falls within North East England. Small areas in the west of the county are covered by the North West England region.