The Thames Valley District School Board (TVDSB; known as English-language Public District School Board No. 11 prior to 1999) is a public school board in southwestern Ontario, Canada.

The TVDSB serves an area over 7,000 square kilometres which includes urban, suburban and rural communities. It spans three counties and includes the cities of London, St. Thomas, and Woodstock, plus the towns of Ingersoll, Tillsonburg, and Strathroy-Caradoc, as well as several smaller towns and villages.

As of 2006, the Board administered 184 schools (154 elementary and 30 secondary schools). They also provide alternative education programs for approximately 40,000 students through adult day school, continuing education, general interest, night school and summer school courses.

It was created on January 1, 1998, by the amalgamation of the Elgin County Board of Education, The Board of Education for the City of London, Middlesex County Board of Education, and Oxford County Board of Education.

Four future elementary schools in southeast London, southwest London, northwest London, west London, Lucan, Woodstock, and Belmont are currently under construction or are in planning stages. Extensions and renovations to Eagle Heights are currently underway.

In 2021, the Thames Valley District School Board was named as a defendant in a civil lawsuit related to the sexually inappropriate behaviour of one of its teachers, Ryan Jarvis. Jarvis filmed at least 27 teenage students with a spy camera while he was an English teacher at H. B. Beal Secondary School. He used a camera concealed in a pen to film his female students' breasts. Jarvis became the first person in Canada to serve jail time for a voyeurism conviction. Jarvis's teaching license was revoked following his conviction. The Thames Valley District School Board was the setting of R v. Jarvis, 2019 SCC 10 a precedent-setting case of voyeurism in Canada.

In 2021, Lawrence Thompson, a custodian at a TVDSB elementary school, was found guilty of four counts of kidnapping and sexual assault of a four-year-old girl. During the investigation in 2018, the school board indicated it would fully cooperate with police and local law enforcement authorities. However, the TVDSB declined to provide a list of schools that the janitor previously worked at.

In 2024, the TVDSB came under controversy for a spending scandal involving its top executives and officials regarding a $40,000 paid trip to a Toronto Blue Jays game. Following the controversy, the provincial government will audit the board's finances and director of education Mark Fisher has been put under paid leave.

Current trustees for the 2022-2026 term:

• Chair - Beth Mai
• Vice Chair - Dave Cripps

Trustee	Wards	City
Sheri Polhill	1, 11, 12, 14	London
Lori-Ann Pizzolato	1, 11, 12, 14	London
Marianne Larsen	2, 3, 4, 5, 6	London
Leroy Osbourne	2, 3, 4, 5, 6	London
Beth Mai	7, 8, 9, 10, 13	London
Sherri Moore	7, 8, 9, 10, 13	London
Dave Cripps	Oxford County	Oxford County
Leeanne Hopkins	Oxford County	Oxford County
Arlene Morell	Middlesex County	Middlesex County
Christian Sachs	Middlesex County	Middlesex County
Meagan Ruddock	Elgin County	Elgin County
Bruce Smith	Elgin County	Elgin County
Carol Antone	All First Nations	N/A
Shivani Vimal	All Elgin, Middlesex, and Oxford County Students (non-voting)	N/A
Emma Park	All London Students (non-voting)	N/A
Lorissa Westlake	All Indigenous Students (non-voting)	N/A

The following is a list of the schools administered by the TVDSB and their towns/city:

• A. B. Lucas Secondary School – London
• Arthur Voaden Secondary School – St. Thomas
• B. Davison Secondary School – London
• Central Elgin Collegiate Institute – St. Thomas
• London Central Secondary School – London
• Clarke Road Secondary School – London
• College Avenue Secondary School – Woodstock
• East Elgin Secondary School – Aylmer
• Glencoe District High School – Glencoe
• Glendale High School – Tillsonburg
• H. B. Beal Secondary School – London
• Huron Park Secondary School – Woodstock
• Ingersoll District Collegiate Institute – Ingersoll
• London South Collegiate Institute – London
• Lord Dorchester Secondary School – Dorchester
• Medway High School – Arva
• Montcalm Secondary School – London
• North Middlesex District High School – Parkhill
• Oakridge Secondary School – London
• Parkside Collegiate Institute (incl. French Immersion) – St. Thomas
• Saunders Secondary School – London
• Sir Frederick Banting Secondary School (incl. French Immersion) – London
• Sir Wilfrid Laurier Secondary School (incl. French Immersion) – London
• Strathroy District Collegiate Institute (incl. French Immersion) – Strathroy-Caradoc
• Thames Valley Alternative Secondary School (teachers located throughout the entire Board district)
• West Elgin Secondary School – West Lorne
• Westminster Secondary School - London
• Woodstock Collegiate Institute (incl. French Immersion) – Woodstock

• Conseil scolaire catholique Providence – French Catholic School Board
• Conseil scolaire Viamonde – French Public School Board
• List of English public schools in London Ontario
• List of high schools in Ontario
• List of school districts in Ontario
• London District Catholic School Board – English Catholic School Board