| Theta Upsilon | |
|---|---|
| ΘΥ | |
 | |
| Founded | January 1, 1914 University of California, Berkeley |
| Type | Social |
| Former Affiliation | NPC |
| Status | Merged |
| Merge Date | May 6, 1962 |
| Successor | Delta Zeta |
| Scope | National |
| Motto | Let there be light |
| Member badge |  |
| Colors | Red, Orange, Yellow Green, Cyan, Blue, and Violet |
| Symbol | Rising Sun, Rainbow |
| Flower | Iris |
| Tree | Bay tree |
| Mascot | Lion Rampant |
| Patron Greek divinity | Apollo |
| Publication | The Dial |
| Chapters | 38 |
| Headquarters | United States |
Theta Upsilon (ΘΥ) was a national women's fraternity operating in the United States from February 1921 until May 1962, when the group was absorbed by the Delta Zeta sorority.