Sarah Ann Mountain (1769/70 – 8 February 1842) was a British coach, mail and inn proprietor.

She was born in the United Kingdom around 1770 and by 1790 she was married to Butler William Mountain who was about ten years older than her.

Her husband's family ran the Swan with Two Necks coaching inn and by 1808 they owned the Saracen's Head in Snow Hill, London.

Her son Peter claimed to have operated the business after his father died, but he would have been fifteen and over sixty years later she was remembered as a "very noted and spirited female coach and mail proprietor".

Charles Dickens's Nicholas Nickleby was serialised in 1838/9 and the Saracen's Head is mentioned in the story.