Castlereagh carries more colonial history in its street grid than almost any other suburb in the Penrith region. Named by Governor Lachlan Macquarie himself in December 1810 after Lord Castlereagh, the Irish peer behind the 1803 Act of Union, this semi-rural locality east of the Nepean River was one of the first townships formally planned in the region. Surveyor James Meehan marked out its streets and town square in 1811, and while Castlereagh never grew into the major centre Macquarie envisioned, it has retained a character shaped by that early ambition.
Today Castlereagh is a quiet rural locality of around 1,250 residents, sitting about 9 km north-by-west of Penrith city centre on the Nepean River floodplain. Large acreage properties, a strong sense of community, and some of the oldest pastoral land in the district define it. For the broader regional context, see the Western Sydney Regional Guide.
Quick Facts
Castlereagh Suburb Map
Castlereagh sits east of the Nepean River, approximately 9 km north-by-west of Penrith city centre. It is bounded by the Nepean River to the west, with Llandilo to the east and Cranebrook to the south. The Castlereagh Road runs through the locality, connecting it to Penrith in the south and Richmond to the north. The flat river valley terrain and proximity to the Nepean floodplain give Castlereagh a distinctly rural feel that has resisted the suburban development pressing in from the south and east.
History and Heritage
In November 1810, Governor Lachlan Macquarie went on a tour of the Hawkesbury-Nepean region, shortly after arriving in the colony. On 6 December 1810, he recorded in his journal that he had named the township Castlereagh, in honour of Lord Castlereagh (1769 to 1822), the Irish peer responsible for the Act of Union between Ireland and England in 1803. In 1811, surveyor James Meehan marked out Castlereagh’s streets and town square, making it one of the earliest formally planned townships in the Penrith region. The suburb was formally gazetted on 24 October 1969 with a boundary update on 10 October 1997.
Castlereagh was one of five towns established by Governor Macquarie along the Hawkesbury-Nepean river system, alongside Windsor, Richmond, Wilberforce, and Pitt Town. These townships were planned as part of Macquarie’s vision for orderly colonial settlement, though Castlereagh remained the smallest and least developed of the five. Its relative quietness has preserved much of the original rural landscape that surrounded the planned township.
Is It Worth Visiting?
Castlereagh rewards those with an interest in early colonial history and rural landscape. It is not a polished heritage tourism destination, but its Macquarie-era origins and Nepean River setting give it genuine historical significance. Most visitors who come do so deliberately, knowing what they are looking for.
The original town plan laid out by surveyor Meehan in 1811 can still be traced in the locality’s road pattern. The Nepean River frontage provides scenic rural landscape and access to the river parklands that stretch between Penrith and Windsor. For those interested in the early history of European settlement in the Sydney Basin, Castlereagh is one of the less-visited but historically significant stops along the Hawkesbury-Nepean corridor.
Beyond history, the rural landscape is the draw. Flat country, big skies, and the sense of a slower pace of life make Castlereagh worth a drive if you are exploring the region between Penrith and the Hawkesbury.
What Is It Like Living Here?
Castlereagh suits those seeking acreage living with genuine rural character close enough to Penrith to remain practical. Average household size of 3.4 persons points to family occupancy of large properties, with most households owning rather than renting. A strong community identity built over generations gives Castlereagh a cohesion uncommon in newer suburbs. It does not suit anyone reliant on public transport or requiring walkable daily amenities.
Amenities, Dining and Shopping
There are no retail or food services within Castlereagh itself. Residents drive to Penrith for all shopping and dining needs, with Westfield Penrith approximately 12 km south providing full retail coverage. The Penrith CBD and surrounding commercial areas handle everything else. The isolation from services is simply part of the lifestyle here.
Sports and Fitness
The Nepean River and surrounding parklands provide bushwalking, cycling, and water-based recreation close to home. A major feature is the Sydney International Regatta Centre. The broader Penrith area has an extensive network of sporting clubs and facilities accessible by car.
Schools
There are no schools within Castlereagh. Children attend schools in Cranebrook, Penrith, or along the Castlereagh Road corridor. Cranebrook High School is the nearest public secondary school. Several primary schools in the broader Penrith north area serve the community.
Hospitals
Nepean Hospital in Kingswood is approximately 14 km south and is the primary public hospital for Castlereagh residents. Hawkesbury District Health Service in Windsor is also reachable for those in the northern part of the locality.
What Locals Say
Residents describe Castlereagh as one of the last genuinely rural localities within Greater Sydney. The community is tight-knit, the properties are large, and the pace of life is slower than the city it is technically part of. The Nepean River is a constant backdrop and a source of identity. Concerns centre on the gradual encroachment of suburban development from Cranebrook and the south, and the long-term question of whether the rural zoning will hold.
Realty Market
Buying in Castlereagh
Castlereagh’s median house price of approximately $2.78 million as of 2026 reflects the acreage nature of properties rather than any urban premium. Large rural lots on the Nepean River floodplain, some with river frontage, command significant prices among buyers seeking lifestyle properties. With only around 7 house sales per year, the market is thin and individual property characteristics drive price strongly. Capital growth of around 9 per cent annually reflects both the limited supply and growing demand for rural lifestyle properties within reach of Sydney.
Renting in Castlereagh
The rental market is minimal. Most properties are owner-occupied and rental listings are rare. Houses when available command around $1,000 per week, reflecting the acreage and rural setting rather than proximity to services.
Key Features and Local Highlights
Sydney International Regatta Centre
The Sydney International Regatta Center is a rowing and kayaking course purpose built for the 2000 Sydney Olympics. It remains well-maintained and open to public and also offers a 5 km path where you can enjoy walking, cycling or running around the picturesque lake.
The 1811 town plan drawn by surveyor James Meehan is still legible in Castlereagh’s road pattern, making it one of the few places in Greater Sydney where early 19th-century colonial planning can be traced in the contemporary landscape. The original town square area and street alignments survive as a quiet historical marker in an otherwise rural setting.
Hadley Park
The state heritage-listed Hadley Park is the last substantial fragment of what used to be a sprawling, intact rural colonial estate, and it’s part of a small cluster of sites that together trace the district’s arc from first contact to the present day.
The Nepean River forms the western boundary of Castlereagh, providing riverfront acreage properties and access to the river parklands extending between Penrith and Windsor. The Nepean here is broader and slower than the gorge section near Penrith, with a pastoral quality that defines the locality’s character.
Castlereagh retains active agricultural use on many of its larger properties, including market gardens and hobby farms. This working rural character distinguishes it from purely residential acreage suburbs and reflects the continuity of land use from the original colonial grants through to the present day.
Transport
Bus
Public transport in Castlereagh is extremely limited. A car is essential for all daily activities. Occasional bus services run along Castlereagh Road connecting to Penrith, but frequency is low and unsuitable for regular commuting.
Rail
The nearest train station is Penrith on the T1 Western Line, approximately 12 km south. From Penrith, trains run to Parramatta (30 min) and Sydney City (60 min). Most Castlereagh residents drive to Penrith Station for rail travel.
Distance to CBD and Airport
Castlereagh is approximately 55 km from Sydney CBD by road. Kingsford Smith Airport is approximately 68 km south-east. Western Sydney Airport at Badgerys Creek, opening October 2026, will be approximately 25 km south, a significant improvement in airport access for the Penrith region’s rural localities.
Frequently Asked Questions
What is the postcode for Castlereagh?
Castlereagh’s postcode is 2749.
Which LGA is Castlereagh in?
Castlereagh is within Penrith City Council.
Is Castlereagh a good place to live?
For those seeking large rural acreage with genuine community character within Greater Sydney, Castlereagh is an excellent choice. It is entirely unsuitable for those without a car or requiring walkable services.
How far is Castlereagh from Sydney CBD?
Approximately 55 km by road, around 55 minutes by car in off-peak conditions. By public transport the journey requires driving to Penrith Station first, adding considerable time.
What is the median house price in Castlereagh?
Approximately $2.78 million as of 2026, reflecting the large acreage lots that dominate the suburb.
How did Castlereagh get its name?
Governor Lachlan Macquarie named the township Castlereagh in December 1810, during a tour of the Hawkesbury-Nepean region, honouring Lord Castlereagh, the Irish peer responsible for the Act of Union between Ireland and England in 1803. Surveyor James Meehan formally laid out the town streets and square in 1811.
Was Castlereagh one of the five Macquarie towns?
Yes. Castlereagh was one of five towns established by Governor Macquarie along the Hawkesbury-Nepean river system, alongside Windsor, Richmond, Wilberforce, and Pitt Town. It remains the smallest and least developed of the five, which has preserved its rural character.