The St John's Anglican church complex in Main Street includes a Sunday school and parish hall. The church is amongst the oldest buildings in the Shire of Nillumbik, built about 1867. It has three stained glass windows. The complex is considered significant and is listed on the Victorian Heritage Register. On the other side of St John's is Ashton Manor, previously known as The Abbey. It was a reception centre and very popular for weddings and other celebrations. It is now the location for Tobin Brothers Funerals. Nillumbik Historical Society was formed in 1973 and is situated in the Ellis Cottage historical precinct. The Diamond Creek Community Centre is jointly administered by the Shire of Nillumbik and the
YMCA, and provides a venue for basketball, gymnasium and group fitness classes, child care, community classes and public and private functions. The centre also houses Nillumbik's Maternal and Child Health Service. The Community Centre served as an evacuation point, providing emergency accommodation, first aid and government relief to local residents affected by the
February 2009 Victorian bushfires. Diamond Creek has two football clubs, Diamond Creek Football Club and Diamond Creek Women's football club playing in the
Northern Football League. The
Rotary Club of Diamond Creek organise the annual Diamond Creek Town Fair, a community event held in September. It commences with a parade which features local schools, scouting groups, child care centres and community groups. The fair offers food, crafts and fairground attractions, rides, wood chopping, local community stallholders, and entertainment. It traditionally concludes with an evening torchlight parade by the local
CFA units and a fireworks display. Diamond Creek Little Athletics Club is one of the eight clubs competing weekly at the Diamond Valley Little Athletics Centre at
Willinda Park Greensborough. Diamond Creek also has a busy CFA (Country Fire Authority) volunteer fire brigade, which attends to over 230 emergency calls annually. The brigade was established in 1942. In 2005, a new emergency services centre was built on the Main Hurstbridge Rd, which includes CFA,
Metropolitan Ambulance Service and
Police facilities. The Diamond Creek CFA brigade has approximately 60 members, one pumper, two tankers, a slip on
ute and a Toyota Hilux FCV, as well as an extensive collection of modern, advanced firefighting equipment and training facilities. Diamond Creek is serviced by the Diamond Valley Division of
St John Ambulance Australia (Victoria). St John Ambulance provides emergency pre-hospital care to local events in Diamond Creek, such as the Town Fair, Pet Expo, Fun Runs and many other local events. The Diamond Valley division is based in Greensborough. In 1981, an
opportunity shop opened to raise funds for the
Austin Hospital in
Heidelberg. It raised over $2 million in its 30-year operation until its closure in 2011 when the building was deemed unsafe. In February 2013, the shop re-opened after a benefactor donated funds for the hospital to meet the cost of the renovations. The Diamond Creek OM:NI discussion group was formed in 2010. They meet at the Diamond Creek Netball Club A new dedicated ambulance home base was opened in April 2019. Paramedics were previously housed in the emergency services complex with police and firefighters. The branch features a spacious garage for vehicles, rest and recline areas, a training room and kitchen, The branch provides 24-hour emergency care. A
Tram Cafe opened in October 2020. This is a fully refurbished
W Class Melbourne tram acquired from the
Victorian State Government after a successful application by the
Rotary Club of Diamond Creek, Diamond Creek CFA, Diamond Creek Men's Shed and Nillumbik Shire Council. The cafe features a large deck and pergola and state of the art playground. Araluen, a disability support service in Diamond Creek, run the cafe three days a week. Diamond Creek is serviced by
Yarra Plenty Regional Library's Mobile Library. ==Notable residents==