People with the last name Castonguay in Connecticut
- Robert Castonguay
- Roger Castonguay
- Roland Castonguay
- Rollande Castonguay
- Ronald Castonguay
- Rose Castonguay
- Rosemarie Castonguay
- Ryan Castonguay
- Sally Castonguay
- Sharon Castonguay
- Shawn Castonguay
- Solange Castonguay
- Stacey Castonguay
- Stephanie Castonguay
- Susan Castonguay
- Tammy Castonguay
- Tanya Castonguay
- Taryne Castonguay
- Thomas Castonguay
- Tina Castonguay
- Tyler Castonguay
- Valdor Castonguay
- Vale Castonguay
- Vivian Castonguay
- William Castonguay
- Zofia Castonguay