The Great Landowners of Great Britain and Ireland (originally The Acre-Ocracy of England) is a reference work published by in four editions between 1876 and 1883, giving brief details of individuals owning land in the United Kingdom of Great Britain and Ireland to a total of 3,000 acres (1,200 ha) or valuation of £3000 annual income. It has become a standard primary source for historians of the Victorian era.