- In 1978, she was made a member of the Order of Canada.
- She was promoted to Officer in 1985, and promoted again to Companion in 2000.
- In 1988, she was awarded the Order of Ontario.
- In 2004, the City of Toronto noted its intention to name a street in Callwood's honour.
- Callwood requested that an existing street not be renamed for her, and specified that it be a new or currently unnamed street near a school or a playground.
- The street is June Callwood Way and is in the neighbourhood of Queen Street East and Broadview Avenue.
- June Callwood was named Toronto Humanist of the Year 2004 by The Humanist Association of Toronto.
- This yearly honour is presented by H.A.T. to men and women who, in their actions, and creative endeavours, exemplify the principles of Humanism: a commitment to reason, compassion, ethics and human dignity.
- In July 2005, a Toronto park was named after Callwood. A professorship in social justice was also established at Victoria College, University of Toronto in her honour. In 2008, Premier Dalton McGuinty declared June 2 of every year to be June Callwood Day.