Gladys Naby Muriel Nicholls, Lady Nicholls (née Bux; 21 October 1906 – 28 January 1981) was an Australian Aboriginal activist, who made significant contributions to developing support networks and improving conditions for the urban Aboriginal community in Melbourne, Victoria, and across Australia, from the 1940s to the 1970s. Nicholls was inducted onto the Victorian Honour Roll of Women in 2008.