Harrogate (/ˈhærəɡət, -ɡeɪt, -ɡɪt/ HARR-ə-gət, -⁠gayt, -⁠ghit) is a spa town and civil parish in the district and county of North Yorkshire, England. Historically in the West Riding of Yorkshire, the town is a tourist destination; its visitor attractions include its spa waters and RHS Harlow Carr gardens. Yorkshire Dales National Park and the Nidderdale AONB are 13 miles (21 km) away from the town centre.

In the 17th century, Harrogate grew out of two smaller settlements, High Harrogate and Low Harrogate. For three consecutive years (2013–2015), polls voted the town as "the happiest place to live" in Britain. Harrogate spa water contains iron, sulphur, and common salt (NaCl). The town became known as 'The English Spa' in the Georgian era, after its waters were discovered in the 16th century. In the 17th and 18th centuries its 'chalybeate' waters (containing iron) were a popular health treatment, and the influx of wealthy but sickly visitors contributed significantly to the wealth of the town.

Harrogate railway station and Harrogate bus station in the town centre provide transport connections. Leeds Bradford Airport is 10 miles (16 km) southwest of Harrogate. The main roads through the town are the A61, connecting Harrogate to Leeds and Ripon, and the A59, connecting the town to York and Skipton. Harrogate is also connected to Wetherby and the A1(M) by the A661, while the A658 from Bradford forms a bypass around the south of the town. Harrogate had a population of 73,576 at the 2011 UK census; the built-up area comprising Harrogate and nearby Knaresborough had a population of 89,060, while the figure for the much wider Borough of Harrogate, comprising Harrogate, Knaresborough, Ripon, as well as a number of smaller settlements and a large rural area, was 157,869.

The town motto is Arx celebris fontibus, which means "a citadel famous for its springs".

The name Harrogate is first attested in the 1330s as Harwegate, Harougat and Harrowgate. The origin of the name is uncertain. It may derive from Old Norse hǫrgr 'a heap of stones, cairn' + gata 'street', in which case the name presumably meant 'road to the cairn'. Another possibility is that the name means "the way to Harlow". The form Harlowgate is known from 1518, and apparently in the court rolls of Edward II.

In medieval times Harrogate was a place on the boundary of the township of Bilton with Harrogate in the ancient parish of Knaresborough, and the parish of Pannal, also known as Beckwith with Rossett. The part within the township of Bilton developed into the community of Low Harrogate, and the part within Pannal developed into the community of High Harrogate. Both communities were within the Royal Forest of Knaresborough. In 1372 King Edward III granted the Royal Forest to his son John, Duke of Lancaster (also known as John of Gaunt), and the Duchy of Lancaster became the principal landowner in Harrogate.

Harrogate's development is owed to the discovery of its chalybeate- and sulphur-rich spring water from the 16th century. The first mineral spring was discovered in 1571 by William Slingsby, who found that water from the Tewit Well in High Harrogate possessed similar properties to that from springs in the Belgian town of Spa, which gave its name to spa towns. The medicinal properties of the waters were publicised by Edmund Deane; his book, Spadacrene Anglica, or the English Spa Fountain was published in 1626.

In the 17th and 18th centuries further chalybeate springs were discovered in High Harrogate, and both chalybeate and sulphur springs were found in Low Harrogate. The two communities attracted many visitors. A number of inns were opened for visitors in High Harrogate in the 17th century (the Queen's Head, the Granby, the Dragon and the World's End). In Low Harrogate, the Crown Hotel was open by the mid-18th century, and possibly earlier.