The peerage was created in September 1857 for the Whig politician Lord Robert Grosvenor.

Both Lord Robert and his elder brother Lord Thomas were in special remainder to the viscountcy of Grey de Wilton and the earldom of Wilton, created for their maternal grandfather in 1801.

Upon the latter's death in 1814, Lord Thomas succeeded as second Earl of Wilton.

Lord Ebury was succeeded by his eldest son, the second Baron.

The Honourable Norman Grosvenor, younger son of the first Baron, sat as Member of Parliament for Chester.