The HG postcode area, also known as the Harrogate postcode area, is a group of five postcode districts in England, which are subdivisions of three post towns. These postcode districts cover Harrogate, Ripon and Knaresborough in North Yorkshire.
HG1 and HG2 cover most of Harrogate; HG1 covering areas north of The Stray while HG2 covers areas to the south. HG3 spans across some of the western suburbs as well as a large rural area north and west of the town. HG4 covers Ripon and some surrounding settlements. HG5 covers Knaresborough and some rural areas to the north and east.
HG postcode area Wikipedia
The approximate coverage of the postcode districts: