Mental Health Act is a stock short title used for legislation relating to mental health law.

• The Mental Health Act (Ontario)

• The Mental Health Care Act, 2017

• The Mental Health Act 2001

• The Mental health (Compulsory Assessment and Treatment) Act 1992

• The Mental Health Act 2001

• The Mental Health (Care and Treatment) Act (Singapore) passed in 2008

• The Mental Health Act 1959 (c. 72)
• The Mental Health (Amendment) Act 1982 (c. 51)
• The Mental Health Act 1983, an Act of the Parliament of the United Kingdom
• The Mental Health (Scotland) Act 1984, an Act of the Parliament of the United Kingdom
• The Mental Health (Detention) (Scotland) Act 1991 (c. 47)
• The Mental Health (Amendment) Act 1994 (c. 6)
• The Mental Health (Patients in the Community) Act 1995 (c. 52)
• The Mental Health (Public Safety and Appeals) (Scotland) Act 1999 (asp 1)
• The Mental Health (Amendment) (Scotland) Act 1999 (c. 32)
• The Mental Health (Care and Treatment) (Scotland) Act 2003, an Act of the Scottish Parliament
• The Mental Health Act 2007, an Act of the Parliament of the United Kingdom
• The Mental Health (Wales) Measure 2010 (nawm 7)
• The Mental Health (Discrimination) Act 2013 (c. 8)
• The Mental Health Units (Use of Force) Act 2018 ^{[1] [2]}

• The National Mental Health Act of 1946, which called for the establishment of a National Institute of Mental Health
• The Community Mental Health Act, created by John F. Kennedy in 1963 as part of his New Frontier
• The Mental Health Parity Act of 1996

• List of short titles