Katy
- Cathie
- Cathy (given name)
- Cati (disambiguation)
- Frank O'Hara
- Greater Katy
- Ice Cold in Alex
- K-K-K-Katy
- KATY-FM
- KT (disambiguation)
- Katherine
- Kathi (disambiguation)
- Kathie
- Kati (disambiguation)
- Katie (disambiguation)
- Katies
- Katy (Marvel Cinematic Universe)
- Katy (TV series)
- Katy (apple)
- Katy (given name)
- Katy (novel)
- Katy (series)
- Katy Fox
- Katy High School
- Katy Too
- Katy Township, Boone County, Missouri
- Katy, Missouri
- Katy, Texas
- Katy, West Virginia
- Katydid (disambiguation)
- Kać
- Kąty (disambiguation)
- Missouri–Kansas–Texas Railroad
- Mosaic Brands
- The Katies
- Watertown Regional Airport