Amelia Long, Lady Farnborough (1772-1837) was a watercolour painter who specialized in landscapes and botanical subjects.
She was the elder daughter of Sir Abraham Hume and Amelia Egerton of Belton House, Lincolnshire. Together with her sister Sophia, Countess Brownlow, she inherited her parents' art collection. She was married on 28 May 1793 to Charles Long, afterwards first Baron Farnborough.
She was well known in her day as a judge of art and a skilled horticulturist, and largely assisted in laying out the gardens at Bromley Hill, Kent. She specialised in landscapes of the Bromley area in Kent and was an honorary exhibitor at the Royal Academy from 1807 to 1822 and at the British Institution in 1825. She is now regarded as one of the few talented women practitioners of early English watercolour paintings. Examples of her work are held by National Galleries Scotland, Dundee Art Gallery and the British Museum.
She died without issue at Bromley Hill on 15 January 1837, and was buried at Wormley, Hertfordshire, with an elaborate tomb by Richard Westmacott.