Margaret of Mar, 31st Countess of Mar

The Right Honourable The Countess of Mar
Member of the House of Lords
Lord Temporal
as a hereditary peer 11 September 1975 – 11 November 1999
Preceded by	The 30th Earl of Mar
Succeeded by	Seat abolished
as an elected hereditary peer 11 November 1999 – 1 May 2020
Preceded by	Seat established
Succeeded by	The 9th Baron Londesborough
Personal details
Born	Margaret Alison Lane (1940-09-19) 19 September 1940 (age 83)
Political party	Crossbench
Spouses	Edwin Noel Artiss ​ ​ (m. 1959; div. 1976)​ John Salton ​ ​ (m. 1976; div. 1981)​ John Jenkin ​ (m. 1982)​
Children	Susan of Mar, Mistress of Mar
Parents	James of Mar, 30th Earl of Mar Millicent Mary Salton

Margaret Alison of Mar, 31st Countess of Mar (born 19 September 1940), is a Scottish hereditary peer and politician. She was a crossbench member of the House of Lords from 1975 to 2020 and was one of 92 hereditary peers elected to remain in the Lords in 1999. She is the holder of the original earldom of Mar, the oldest peerage title in the United Kingdom. She is the only suo jure countess and was the only female hereditary peer in the House of Lords from 2014 to 2020. She is also a farmer and former specialist goats cheesemaker in Great Witley, Worcestershire.