In the 19th century, Hilldale had a small population and the settlement consisted of scattered farms and worker's cottages. The opening of the local quarry in the 1880s brought new opportunities to the area and it served as one of the main sources of employment until its closure in the 1970s. Hilldale established its own parish council on 1 April 1999, having previously been a ward of Wrightington civil parish.
According to the United Kingdom Census 2011, Hilldale parish had a population of 581 people living in 248 households, with an approximate : ratio of males to females. The parish covers an area of, giving a population density of. The decrease in population from 633 recorded in 2001 represents a decline of over ten years. A majority of residents were born in the United Kingdom, and identified as being of "White British" ethnicity. Religion was recorded as Christian, with of residents being of no religion, and declining to state; only belonged to an alternative religion. Of the 437 residents aged between 16 and 74, a total of 289 were regarded as economically active, with five being unemployed.
Landmarks
Hilldale has several listed buildings that are recorded on the National Heritage List for England, including Fairhurst Hall, an 18th-century brick house incorporating some older 16th century remains, a medievalstone cross base, and other farmhouses and farm buildings. In addition, West Lancashire Borough Council publishes its own "list of locally important buildings", which features a large brick villa on Robin Lane divided into two dwellings. There are two designated conservation areas that lie partially within Hilldale: the Lancaster Lane conservation area is largely in Parbold but extends into the southern part of Hilldale and includes the aforementioned Fairhurst Hall, while the Maltkiln Lane/Chorley Road conservation area straddles the boundary with Bispham. Hunters Hill, a former quarry to the east of Hill Dale village, has been converted into a countryside park and is maintained by the Borough Council.
Transport
There are no main roads in Hilldale; the B5246 road passes through the southern part of the parish, running southeast from Mere Brow to Parbold, where it terminates at its junction with the A5209 about to the south. The nearest motorway link is junction 27 of the M6, about to the southeast at Wrightington. Parbold railway station is located about to the south and provides services to Manchester and Southport.