Thomas Walker was a New South Wales colonial politician, merchant banker and philanthropist. At the time of his death, he was one of the wealthiest and most influential colonialists in New South Wales.

The Yaralla Estate, also known as the Dame Eadith Walker Estate and now home to the Dame Eadith Walker Hospital, is a heritage-listed hospital at The Drive, Concord West, City of Canada Bay in Sydney, New South Wales, Australia.