Newington College is a multi-campus independent Uniting Church co-educational early learning, primary and secondary day and boarding school, primarily located in Stanmore, an Inner West suburb of Sydney, Australia. Established in 1863 at Newington House, Silverwater, the College celebrated its sesquicentenary in 2013. The college is open to children of all faiths and denominations. Newington has been governed by an Act of Parliament since 1922.

Newington has two preparatory schools: Wyvern House in Cambridge Street, Stanmore, and a school at Lindfield on Sydney's Upper North Shore. The College also has a campus on the Mid North Coast at Eungai Creek, where Newington's social service immersion program takes place. Newington currently caters for about 2000 students from their ELC to Year 12. Edmund Webb House, a boarding facility, is in Cambridge Street, Stanmore. The Robert Glasson Memorial Boat Shed is on the Parramatta River at Abbotsford and contains a boarding facility for thirty boys.

As of 2025, Newington has 16 houses, expanded from eight houses. The College is a member of the Association of Heads of Independent Schools of Australia (AHISA), the Junior School Heads Association of Australia (JSHAA), the Australian Boarding Schools' Association, and is a founding member of the Athletic Association of the Great Public Schools of New South Wales (AAGPS).

The College prepares students for the International Baccalaureate Diploma Programme, the VET, Cambridge IGSCE and the NSW Higher School Certificate.

In 2026 Newington will become co-educational with the admittance of girls into Year 5 and Kindergaren in 2026, Year 7 and 11 in 2028, with the intention of becoming fully co-ed by 2033.