The May Court Club of St. Catharines (MCCSC) is a service club for women living in St. Catharines and surrounding areas of the Niagara Region of Ontario, Canada. The Club raises money for organizations that support the needs of women and children, and especially in the areas of health and nutrition. The Club also facilitates volunteering for members in organizations that address the Mission of the Club.

The first May Court Club was founded in Ottawa in 1898. The St. Catharines chapter was founded in 1935, and continues to attract women who wish to contribute to our communities' well-being through volunteering and fundraising.

During the 85 years of the MCCSC’s existence, members have donated time and energy to placements and projects in approximately 100 different organizations, and have donated money to over 175 causes. Although the focus of the Club's support varies over the years according to community needs, some of our longest ongoing support has been for family nutrition, children with disabilities, and at-risk and homeless youth. 

The St. Catharines chapter is one of nine clubs that make up the Association of May Court Clubs of Canada.