Elizabeth Andrew Warren (28 April 1786 – 5 May 1864) was a Cornish botanist and marine algologist who spent most of her career collecting along the southern coast of Cornwall. Her goal was to create a herbarium of indigenous plants of Cornwall, and to this end she organized a network of plant collectors for the Royal Horticultural Society of Cornwall and provided numerous specimens to William Hooker at Kew Gardens for his study of British flora.