Tammy Do was born in 1989 in Saigon (now officially known as Ho Chi Minh City), Vietnam. Her father worked for the military of South Vietnam and her mother was a stay-at-home mother. She and her family moved to San Jose, U.S. in 1992 and stayed with her paternal grandmother who immigrated earlier. In 1998, her family moved to Houston to help out with a family business owned by her aunt. They lived with her father's older brother in the Bellaire area of Houston. She attended Mission Glen Elementary, Hodges Bend Middle School, and George Bush High School. She held her first job as a hostess at Le Madeleine restaurant when she was 17. She attended University of Houston, entering as a pre-dental student, later declaring a Marketing major and Risk Management & Insurance minor. She currently works as a Financial Advisor at Mass Mutual Financial Group. She is also the Vice President of the Vietnamese American Chamber of Commerce in Houston.