Andrew Lockhart McLachlan, (born 14 January 1966) is an Australian politician who has been a member of the South Australian Legislative Council since the 2014 state election, representing the South Australian Division of the Liberal Party of Australia.
Prior to entering Parliament, McLachlan was a lawyer, army officer and a businessman working in the financial services industry.
On 3 May 2018, McLachlan was elected President of the South Australian Legislative Council.