Robert Augustus de Lasaux (24 November 1834 – 7 December 1914) was an English amateur cricketer. He was born at Canterbury in Kent in 1834, the son of the city coroner and was educated in Canterbury and in Kennington. De Lasaux died at Canterbury in 1914 aged 80. His obituary in The Times records that he was "an expert diabolo player" as a youth and had revived his skills for an exhibition in 1907.