The Domesday Survey of 1086 refers to Upton, and a wood for 200 pigs, worth £15. Upton took its name from its situation at the top of the slope from the river terrace — the various levels in the area having been formed in the Ice-Age.
The ancient parish, and the civil parish until 1894, included Chalvey and Slough, originally hamlets, and was formally known as Upton-cum-Chalvey. In 1894 the new civil parish of Slough was formed from the parish. In 1895 a detached part of the parish was transferred to Gerrards Cross, and in 1900 and 1901 the rump of the parish was divided between the neighbouring parishes of Eton, Langley Marish, Slough and Wexham. The ecclesiastical parish is still known as Upton-cum-Chalvey.
Upton's Norman Church, St Laurence's Church, is around 900 years old. It was the marriage place (7 May 1788) and burial place (1822) of Sir William Herschel (in whose memory there stands a newly erected stained-glass window depicting Uranus, which he discovered, and other planets), and the burial place of Charles Hatchett who discovered niobium.
Upton Court is the name of the original manorial buildings for the parish of Upton. Parts of Upton Court were built in 1325. In the 19th century, it was a seat of the Burton family and was, up until March 2010, home to the Slough Observer newspaper. The nearby Slough Grammar School changed its name in 2013 to Upton Court Grammar School.
The Mere is a 19th-century half-timbered building, built in 1887 by the grandson of Richard Bentley, is now the head office of the National Foundation for Educational Research. Long Close School was established in the area in 1940.
In 2011, the 3.5-hectare (8.6-acre) Grade II listed park and nature reserve underwent a restoration project to re-establish the area to its former Victorian glory with a lottery grant of £2.7m from the Heritage Lottery Fund. Friends of Herschel Park, a local conservation group, was created to manage the restoration, as well as to oversee the design and maintenance of the area. The park regularly holds events for adults and children throughout the year.