She is survived by her daughter, Frances Beatrix Spade, and husband Andy Spade. Police said a medical examiner will perform an autopsy.
The Good Place actress Jameela Jamil said she was "extremely sad" to hear about Spade's passing, adding she was "an iconic talent".
"We want to honour her life and her major contribution to the fashion business and express our most honest condolences to the family". "It's an adornment, not an obsession".
The businesswoman was found "unconscious and unresponsive" at approximately 10:20 a.m. ET on Tuesday and pronounced dead at the scene, a New York Police Department PIO told Us. She left a note, but officials did not know what it said.
Officials are not authorised to divulge any additional information as the investigation into her death continues. The brand now has 140 stores in the United States and an additional 175 retail outlets around the world.
In 2006, Neiman Marcus sold the Kate Spade Brand to 2006 to Liz Claiborne Inc for $124 million. Coach later purchased it in 2017 for US$2.4 billion, and its products are still sold in over 450 stores around the world. "My heart goes out to her family and to all she has touched".
Fellow designers and industry executives reacted to the news of Spade's death.
Kate Spade has been found dead of an apparent suicide.
Born Katherine Noel Brosnahan, the Kansas City, Missouri, native was a former accessories editor at the now-closed Mademoiselle magazine before she and Andy Spade launched their namesake design company, Kate Spade New York, in 1993.
Ivanka Trump, who, in addition to working in the White House, runs a fashion line of her own, and singer Josh Groban were two of many who encouraged people struggling with depression to seek help.
"My grandmother gave me my first Kate Spade bag when I was in college".
"Fuzzy picture but i love it. Kate and I during Christmas family photos", David captioned the photo.