Ernest William Beckett, 2nd Baron Grimthorpe, was a British banker and Conservative politician who sat in the House of Commons from 1885 until 1905 when he inherited the Grimthorpe peerage.

Baron Grimthorpe, of Grimthorpe in the East Riding of the County of York, is a title in the Peerage of the United Kingdom. It was created on 17 February 1886 for the lawyer and architect Edmund Beckett, 5th Baronet, with remainder to the heirs male of his father. He was succeeded according to the special remainder by his nephew, the second Baron. He had earlier represented Grimsby in Parliament. As of 2014 the titles are held by the latter's great-grandson, the fifth Baron, who succeeded his father in 2003.