Ms Dawson was a barrister at Eight Selborne Chambers.
She died during the 16-hour siege that ended after police entered the Lindt café on Sydney’s Martin Place.
It is unclear at this stage whether Ms Dawson was killed by the gunman or got caught in the crossfire.
Eight Selborne Chambers is located on Phillip Street, adjacent to Martin Place.
Lawyers Weekly spoke to Katrina’s brother, Banco Chambers barrister Sandy Dawson, earlier this morning, who said his family was devastated by Katrina’s loss.
The gunman, Man Haron Monis, was also killed after police entered the café.
NSW Bar Association president Jane Needham SC also paid tribute to Ms Dawson.
"Katrina was one of our best and brightest barristers who will be greatly missed by her colleagues and friends at the NSW Bar," she said. "She was a devoted mother of three children, and a valued member of her floor and of our bar community."
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