The Holland Purchase was a large tract of land in what is now the western portion of the U.S. state of New York. It consisted of about 3,250,000 acres (13,000 km²) of land from a line approximately 12 miles (19 km) to the west of the Genesee River to the present western border and boundary of New York State.
The land bought by the Holland Land Company was formed in 1796 by Wilheim Willink and a group of fellow Dutch bankers from Robert Morris. The bankers initially had hired trustees in the United States, because it was not legal at that time for them to directly own the property. Robert Morris, however, prevailed upon the New York Legislature to repeal that ordinance, which it did shortly thereafter. In recent years, the term Buffalo-Niagara has become popular (particularly north of the Cattaraugus Creek), and has become the name given to the local airport. The name Western New York can refer to the region, but this term can also include the areas in the Phelps and Gorham Purchase as well.
A sales office for the Holland Land Company was opened in 1801 by surveyor and agent Joseph Ellicott in Batavia where land was sold until 1846 when the company was dissolved. Some plots of land were given to persons upon condition that they establish improvements, such as inns and taverns, to encourage growth. The office still exists and is a museum of the Holland Purchase, designated a National Historic Landmark.
In 1802, the entire Holland Purchase, as well as the 500,000 acre (2,000 km²) Morris Reserve immediately to the east, was split off from Ontario County and reconstituted as Genesee County. In the ensuing 40 years after it was formed, Genesee County was repeatedly split to form all or parts of the counties of Allegany (1806), Niagara (1808), Cattaraugus (1808), Chautauqua (1808), Erie (1821), Monroe (1821), Livingston (1821), Orleans (1824), and Wyoming (1841).