This is an accepted version of this page Nancy Diamond (1941 – February 12, 2017) was a municipal politician in Ontario, Canada, who served as mayor of Oshawa from 1991 to 2003.

[7] Her campaign focused on a controversial downtown redevelopment project championed by Mason, which Diamond dismissed as "unrealistic, unmanageable and unfinanceable.

Priorities during her second term included economic diversification, and the revitalization of the city's struggling downtown core.

[14] During this era, she began to attract some controversy for endorsing a plan to amalgamate Oshawa with the neighbouring towns of Whitby and Courtice,[15] and for her handling of an unconfirmed rumour that the board of the Canadian Automotive Museum was planning to move the facility from Oshawa to Toronto.

In the 2003 municipal election, Diamond faced allegations that her style as mayor had been abrasive,[17] that her management of the city's downtown revitalization program was failing and that her focus on freezing municipal tax rates was no longer serving the city's changing needs.