costs in the area. With the abolition of the provinces of New Zealand in 1876, Warkworth became part of Rodney County, which was formed at that time. The highway district was dissolved in 1903, and by 1909 Warkworth had grown to the point where the Warkworth Town District was established, within Rodney County. From 1989 to 2010, Warkworth was part of Rodney District. In November 2010, all city and district councils in the Auckland Region were merged into a single unitary authority, Auckland Council, with Warkworth in the Rodney Local Board area. Electors in Warkworth vote for the seven-member Rodney Local Board, and also a Rodney ward councillor, who represents the area on the Auckland Council. Demographics Warkworth covers and had an estimated population of as of with a population density of people per km2. Warkworth had a population of 5,586 at the 2018 New Zealand census, an increase of 1,317 people (30.9%) since the 2013 census, and an increase of 2,124 people (61.4%) since the 2006 census. There were 2,085 households, comprising 2,709 males and 2,877 females, giving a sex ratio of 0.94 males per female, with 1,002 people (17.9%) aged under 15 years, 888 (15.9%) aged 15 to 29, 2,151 (38.5%) aged 30 to 64, and 1,545 (27.7%) aged 65 or older. Ethnicities were 86.5% European/Pākehā, 9.3% Māori, 6.7% Pacific peoples, 5.6% Asian, and 1.8% other ethnicities. People may identify with more than one ethnicity. The percentage of people born overseas was 27.4, compared with 27.1% nationally. Although some people chose not to answer the census's question about religious affiliation, 48.5% had no religion, 40.0% were Christian, 0.7% had Māori religious beliefs, 1.1% were Hindu, 0.2% were Muslim, 0.5% were Buddhist and 1.8% had other religions. Of those at least 15 years old, 816 (17.8%) people had a bachelor's or higher degree, and 843 (18.4%) people had no formal qualifications. 732 people (16.0%) earned over $70,000 compared to 17.2% nationally. The employment status of those at least 15 was that 1,980 (43.2%) people were employed full-time, 702 (15.3%) were part-time, and 81 (1.8%) were unemployed. Climate Köppen-Geiger climate classification system classifies its climate as oceanic (Cfb), but it is rainier in winter. Education Mahurangi College Mahurangi College is a co-educational secondary school, teaching students between years 7–13 (form 1–7, grade 6–12), with a roll of students as of It was first built on the current site in 1957,