2023 Championnats Banque Nationale de Granby – Women's singles

Kayla Day won the women's singles tournament at the 2023 Championnats Banque Nationale de Granby after defeating Katherine Sebov 6–4, 2–6, 7–5 in the final.

Daria Kasatkina was the defending champion but chose not to defend her title.

Seeds
• # 🇨🇦 Rebecca Marino (semifinals)

• # 🇺🇸 Ashlyn Krueger (semifinals)

• # 🇺🇸 Kayla Day (champion)

• # 🇺🇸 Emina Bektas (quarterfinals, retired)

• # 🇨🇦 Katherine Sebov (final)

• # 🇯🇵 Himeno Sakatsume (quarterfinals)

• # 🇺🇸 Katrina Scott (first round)

• # 🇲🇽 Marcela Zacarías (first round)