Pre-colonial (Aboriginal) era

Rooty Hill was broadly inhabited by the Darug people before European settlement.

Colonial era

The earliest exploration of the area was led by Captain Watkin Tench in 1789.^[2] The origin of this name puzzled historians for many years because the clue lay not in Blacktown City but on Norfolk Island. Governor Philip Gidley King had been in charge of the first settlement there in early 1788 and had noted that the hillside where he had built his Government House had been difficult to dig owing to the amount of tree roots beneath the surface. The hill on Norfolk became known as Rooty Hill and the name is now official.^[3] When King returned to New South Wales he built the headquarters for his government reserve of 1802 at the foot of a hill that reminded him of the Norfolk Island Rooty Hill and used the same name.^[4] The name Rooty Hill first appeared on a map in 1803.

The early development of the area came when Captain William Minchin was given a grant of 400 hectares (1,000 acres) in 1819, leading to the development of the Minchinbury estate. Dr Charles McKay purchased the estate in 1859 and subdivided it in the 1880s. Afterwards, the Watts family built Watts Cottage in Watt Street. It combines Italianate elements with a bullnose verandah and is almost unique in the Blacktown Municipality. It is locally heritage-listed.^[5]

In 1890, the Imperial Hotel was built north of the railway station by F.J. Weston. It was intended to cater for the crowds who attended the greyhound racing at Lamb's Woodstock Coursing Track at Plumpton. By the early 1970s it had become semi-derelict, but was acquired by a local dentist in 1977. It reopened in 1982 and is now state heritage-listed.^[6]

In 1891, the Pioneer Memorial Church, located on Rooty Hill Road South, was built on land donated by Dr Charles McKay. It was originally a Baptist church, but was later acquired for the Presbyterian community by James Angus, owner of the Minchinbury estate from 1895. It is still in use and is locally heritage-listed.^[7]

Post federation

In 1902–1903, the School of Arts, located in Rooty Hill Road South, was built by the residents for community activities. The foundation stone was laid 1 November 1902, by Miss Angus,^[8] daughter of James Angus. It is locally heritage-listed.^[9]

On 13 April 1916, James Angus was killed at Rooty Hill railway crossing, as a result of being hit by that morning's express train. He was survived by his wife, his son James (of Adelaide), his son John (a pastoralist in New South Wales) and his daughter, who by that time was the widow Mrs Fleming.^[10]

The name of James Angus is preserved in Angus Avenue; Charles McKay's name survives in Dr Charles McKay Reserve; the name of the Evans family, who built Fairholme, survives in Evans Road. Fairholme, now part of the St Agnes Catholic High School, is locally heritage-listed.^[11]

Post war

During and following World War II, Australia had realised its demographic crisis in simply not having enough people, exacerbated by the threat of Japanese invasion. In response, Australia allowed immigration from more and more nations as previously restricted by the White Australia policy. In 1973, the Whitlam government effectively abolished the White Australia policy, meaning people would not be denied immigration due to their nationality. Notably, this allowed immigrants from Asia to come in, and in the ensuing decades, especially from the 1990s-2010s, many Filipinos, Indians, Pakistanis, Polynesians and Chinese immigrants populated Rooty Hill, rendering the suburb in the multicultural state it is in today.

In 1964, the Rooty Hill RSL (now known as West HQ) was built, and over time turned into the largest licensed club in New South Wales, serving as a hub for entertainment, fitness and lifestyle. Dubbed by some as the "Vegas of the West", the RSL also has Western Sydney's largest gym, five star accommodation and conference facilities. Currently, the RSL has approximately 50,000 members. West HQ also has Sydney Coliseum Theatre, intended to somewhat be "Sydney Opera House of Western Sydney".

Trains

Rooty Hill railway station is on the Main Western railway line. Rooty Hill station opened on 23 December 1861 as the terminus of the Main Western line when it was extended from Blacktown. On 1 May 1862, the line was extended to St Marys. The station was rebuilt in the 1940s. In 2020, a station upgrade was completed, with renovated platforms, 4 lifts, a new concourse/footbridge replacing the old one, a 6 storey parking garage, and a facelift of the surrounding area.

Bus

Rooty Hill is served by buses which allow its residents to travel east towards Blacktown and throughout Mount Druitt and its satellite suburbs. Notable services would be the 756 and 728.

Road

Rooty Hill Road North and Rooty Hill Road South act as important roads which run along Rooty Hill's longitude, with Rooty Hill Road North connecting Rooty Hill with Plumpton, Oakhurst, and Hassall Grove. Rooty Hill Road South, meanwhile, connects Rooty Hill with Minchinbury, and provides access to the Great Western Highway and the M4 Motorway. Woodstock Avenue connects Rooty Hill with Mount Druitt and Whalan, and also provides access to the Westlink M7 (M7 motorway). Francis Road runs over the railway tracks, connecting the North with the South and connects Rooty Hill with Doonside, once the road turns into Eastern Road after an intersection with Rooty Hill Road South. North Parade and Beames Avenue run along Rooty Hill's latitude, with North Parade connecting the suburb with Mount Druitt's commercial centre.

Christianity

• St. Albans Anglican Multicultural Bible Ministry (MBM)^[23] is located in Westminster Street, Rooty Hill. St Alban's MBM exists in order to lead all people in the multicultural west of Sydney to Christ and into maturity in Christ. Mal Gill is the Lead Pastor and there are Sunday services at 9 am, 10:45 am and 5 pm.
• Rooty Hill Uniting Church^[24] is located on Rooty Hill Road North. Sunday service is at 9am.
• St. Aidan's Parish^[25] is a Catholic church and is located on Adelaide Street, Rooty Hill. Mass times at the parish are: 9 am (Tuesday to Saturday Daily Mass); 6 pm Saturday Vigil Mass; and 7:30 am, 9 am, and 10.30 am Sunday Masses).
• Pioneer Memorial Church^[26] is located on the corner of Rooty Hill Road South and Church Street, Rooty Hill.
• Minchinbury Anglican Church (MAC)^[27] is on Rupertswood Road, Rooty Hill. There are a 10 am Family Service and a 6 pm Evening Service available.
• St Stephen is a Serbian Orthodox Church located on Woodstock Avenue, Rooty Hill.
• Cornerstone Baptist Church is a King James Bible Believing Baptist Church, located on Rooty Hill Road South.

Islam

Rooty Hill Masjid serves as the main mosque for the area. Despite being named after Rooty Hill, the Rooty Hill Masjid is actually in Mount Druitt, though is on the border between Rooty Hill and Mount Druitt.

Hinduism

No proper temples exist, however the Hindu Priest/Pundit Prakash Maharaj offers pooja and ritual services.