Alliance University (New York City)
| Former name | Nyack College (1882–2022) | 
|---|---|
| Type | Private university | 
| Active | 1882–August 31, 2023 | 
| Religious affiliation | Christian and Missionary Alliance | 
| Academic affiliations | CCCU CIC | 
| President | Rajan S. Mathews | 
| Location | , U.S. 40°42′20″N 74°00′56″W / 40.7056°N 74.0156°W | 
| Campus | Urban | 
| Colors | Dark Purple and Alliance Red | 
| Sporting affiliations | NCAA Division II – CACC (North) | 
| Mascot | Warriors | 
| Website | www | 
Alliance University (formerly Nyack College (/ˈnaɪ.æk/ ⓘ) was a private Christian university affiliated with the Christian and Missionary Alliance and located in New York City. It offered undergraduate and graduate programs; in addition, it included Alliance Theological Seminary.
In June 2023, the Middle States Commission on Higher Education announced that it would revoke the university's accreditation in December 2023 due to significant and ongoing financial challenges. On June 30, 2023, university leaders announced that it would cease operations as of August 31, 2023.