Vale Deputy Lord Mayor of Sydney Robyn Kemmis

Sydney's deputy Lord Mayor Robyn Kemmis has died.

Ms Kemmis was visiting family in Queensland for the holiday season when she died suddenly this weekend, Lord Mayor Clover Moore announced on Facebook.

Her death was "an enormous loss", Ms Moore said.

"Robyn was a dedicated and skilled elected representative, a tremendously effective and committed councillor who earned the respect and love of our residential, business and education communities," Ms Moore said.

Ms Kemmis had lived in Glebe for more than 35 years. She was in her early 70s.

In her time with the Council, she worked with young people, including the
Thomas Kelly Youth Foundation, and advocated for social justice, equal opportunity and social housing at Glebe and Millers Point.

Ms Moore said she would miss Ms Kemmis as a friend and a colleague.

"On a personal level, I will miss Robyn's friendship, her warmth and humour, her insight and extraordinary persistence to get the best for all our communities," Ms Moore said.

"My condolences go to Robyn's partner Lyn, her family and friends, and colleagues who will all be as devastated as I am by this loss."