Blanche Lemco van Ginkel CM FRAIC (14 December 1923 – 20 October 2022) was a British-born Canadian architect, city planner, and educator who worked mostly in Montreal and Toronto.

[1] Lemco van Ginkel was the first woman to head a faculty of architecture in Canada and be elected a member of the Royal Canadian Academy of Arts.

"[9] Lemco van Ginkel was recognized for combining urban planning with her architectural skills, with a focus on modernist design as evidenced by the use of bold and unadorned elements.

[11] Other Van Ginkel commissions included the central area plan of Montréal, the urban design of Midtown Manhattan, and the development of Pahang Tenggara, Malaysia.

[12] Lemco van Ginkel and her partner were responsible for designing the master plan of the world fair Expo 67, an important cultural moment in Montreal's and Canada's history.

[2] Lemco van Ginkel is featured with Prof. James Murray and producer Ian MacNeill in Suburban Living: Six Solutions (1960), a National Film Board of Canada film in which they conduct a critical evaluation of 5 European satellite newtowns and housing projects, including Harlow and Alton Estate in the UK, Unité d'habitation in France, Pendrecht in Holland, and Vallingby in Sweden, and contrast them with Canada's Don Mills.

[12][22] Lemco van Ginkel was the first woman to be elected as a Fellow of the Royal Architectural Institute of Canada in 1973, and in 2020 became the third to receive the RAIC Gold Medal after Phyllis Lambert (1991) and Jane Jacobs (1981).

[24] Alongside Phyllis Lambert, Cornelia Oberlander and Denise Scott Brown, she is one of four prominent female architects profiled in the 2018 documentary film City Dreamers.