Christmas Hills is a town in Victoria, Australia, 35 km north-east of Melbourne's Central Business District in the local government area of the Shire of Nillumbik. At the 2011 Census, Christmas Hills had a population of 344.
Christmas Hills is located between Kangaroo Ground and Yarra Glen, along Eltham-Yarra Glen Road (State Route C726), north of the Yarra River, in the Dandenong Ranges. In 1904, the Australian Handbook described Christmas Hills as "an excellent health resort".
The locality is very hilly, with One Tree Hill in the northwest rising to 372 m above sea level, and is home to several reserves, including One Tree Hill Reserve and Sugarloaf Reservoir Park, opened in 1980 and managed by Melbourne Water.