Gerrards Cross is a town and civil parish in Buckinghamshire, England. It lies immediately south of Chalfont St Peter and a short distance west of the London Borough of Hillingdon, from which it is separated by the parish of Denham. Other neighbouring villages include Fulmer, Hedgerley, Iver Heath and Stoke Poges. It is 19 miles (31 km) west-north-west of central London. The town stands on the lower slopes of the Chiltern Hills, and the River Misbourne flows through the parish, north-east of the town. Bulstrode Park Camp was an Iron Age fortified encampment. The town is close to the M25 motorway and the M40 motorway, the latter running beside woodland on the town's southern boundary.

The site of a minor Iron Age hillfort, Bulstrode Park Camp, is to the south-west of the town centre. It is a scheduled ancient monument.

The area which is now Gerrards Cross was historically an area of wasteland known as Chalfont Heath, which later became known as Gerrards Cross Common. In the medieval period, there was no village in the area, which straddled the edges of five different parishes. The name Gerrards Cross, sometimes spelled Jarretts Cross, is recorded from at least 1448, and may relate to an early landowner, Gerard of Chalfont, who is recorded as having owned land in the area in the 14th century.

The origin of the 'cross' element of the name is uncertain; a cross is marked on early maps near the Bull Hotel and Latchmoor Pond at the western end of the common, but whether it was a standing cross marking a boundary or meeting place, or a name for a crossroads is unclear. The modern crossroads of the Oxford Road (the A40) and Windsor Road / Packhorse Lane (B416) was not created until 1707, when an old north-south road through Bulstrode Park was diverted, which was many years after the name Gerrards Cross was first recorded.

Until the 19th century, development in the area was limited to a small number of buildings immediately adjoining the common, most of which were in the parish of Chalfont St Peter.

In 1859, St James' Church was built on Oxford Road. It was initially a chapel of ease for the parish of Fulmer in which it lay, but in 1861 it became parish church of a new ecclesiastical parish called St James, Gerrard's Cross, created from parts of the parishes of Chalfont St Peter, Fulmer, Iver, Langley Marish, and Upton-cum-Chalvey. The creation of the ecclesiastical parish did not change the civil parish boundaries. A new civil parish of Gerrards Cross matching the ecclesiastical parish was subsequently created in 1895.

Gerrards Cross remained a relatively small village at the turn of the 20th century. The parish had a population of 552 at the 1901 census. In 1906, Gerrards Cross railway station opened on the Great Western and Great Central Joint Railway, a new line jointly built by the two companies to improve their routes from the Midlands to London. The station is to the north-east of Gerrards Cross Common, and the area around the station was developed soon after the station opened; by 1911, the population of the parish had grown to 1,612, and it then grew steadily throughout the 20th century.

The large and distinctive parish church is dedicated to St. James. It was built in 1859 as a memorial to Colonel George Alexander Reid who was MP for Windsor, and designed by Sir William Tite in yellow brick with a Byzantine-style dome, Chinese-looking turrets and an Italianate Campanile. In 1969 the singer Lulu married Maurice Gibb of the Bee Gees in the church. The actress Margaret Rutherford is buried with her husband Stringer Davis in the St James Church graveyard.