The next most common country of birth was England at 6.2%. 83.0% of people only spoke English at home. The most common responses for religion were No Religion 34.2%, Catholic 27.4% and Anglican 15.5%. Family households at 78.2% were the main type of household, with single person households at 16.8%. Median monthly mortgage payments were $3,100, much higher than the national median of $1,755. Curl Curl went from being a pristine environment to a tip during the 20th Century. banked by sandstone hills to the South, the ocean to the East and Greendale Creek / Curl Curl Lagoon to the North. In 1980 the local community formed Curl Curl Lagoon Friends to bring the lagoon and its catchment back to good health. Parks and playing fields are located on either side of Curl Curl Lagoon and Greendale Creek. These areas were originally low-lying swampy land that was reclaimed by dumping rubbish on both sides of the lagoon throughout the 1950s and 1960s. Curl Curl Youth Club has organised soccer and netball since 1958. Curl Curl Amateur Swimming Club runs regular Saturday afternoon swim events during the spring and summer months at the South Curl Curl rock pool. The club commenced in 1966 and has been running swimming events every year for swimmers of all ages and abilities ranging from learners to competitive athletes.  1st/2nd Harbord Scouts meet at the scout hall at 43 Stirgess Ave. The Scout hall was opened in 1957  after Mrs Olive Pinkerton donated the land, with Scouts meeting at St. James school hall on Curl Curl Parade from 1929  Harbord Bowling & Recreation Club has four greens and regularly holds world-class tournaments. Dog walking is permitted off leash on Adam St Reserve and Flora and Richie Roberts Reserve  Curl Curl is serviced by six bus routes, 136 Manly to Chatswood, 139 Manly to Warringah Mall, E65 South Curl Curl to Sydney CBD, E76 Dee Why to Wynyard, E77 Dee Why to Wynyard, and the 159 Manly to Dee Why. Freshwater Senior Campus which is part of Northern Beaches Secondary College is for year 11 and 12 students, located on the corner of Harbord Road and Brighton Street, Curl Curl. Manly Campus which is part of Northern Beaches Secondary College is for year 7 to 12 students, located on the corner of Abbott Road and Harbord Road, Curl Curl.