National Register Listings in
Ontario County, New York

Adelaide Avenue School Ashcroft Barden, Levi, Cobblestone Farmhouse Barron, Thomas, House Belhurst Castle Benham House Brigham Hall Building at 426 South Main Street Canandaigua Historic District Canandaigua Historic District (Boundary Increase) Canandaigua Veterans Hospital Historic District Chapin, Thaddeus, House Cleveland, Ephraim, House Clifton Springs Sanitarium Clifton Springs Sanitarium Historic District Cobblestone Manor Cobblestone Railroad Pumphouse Cronkite, Jeremiah, House Dickson, John and Mary, House East Bloomfield Historic District Farmers and Merchants Bank Farmington Quaker Crossroads Historic District Felt Cobblestone General Store First Baptist Church First Baptist Church of Phelps Genesee Park Historic District Geneva Armory Geneva Downtown Commercial Historic District Geneva Hall and Trinity Hall, Hobart & William Smith College Granger Cottage Granger, Francis, House Harmon Cobblestone Farmhouse and Cobblestone Smokehouse Howe, Dr. John Quincy, House Huffman, William, Cobblestone House Knights of the Maccabees Hall Marshall House Miller Corsets, Inc. Factory Morgan Hook and Ladder Company Naples Memorial Town Hall Nester House North Main Street Historic District Ontario and Livingston Mutual Insurance Office Osborne House Parrott Hall Peck, Waltrous, House Phelps Town Hall Port Gibson United Methodist Church Rippey Cobblestone Farmhouse Saltonstall Street School Seneca Presbyterian Church Smith Observatory and Dr. William R. Brooks House Smith's Opera House Sonnenberg Gardens South Bristol Grange Hall 1107 South Main Street Historic District St. Bridget's Roman Catholic Church Complex St. Francis de Sales Parish Complex St. John's Episcopal Church St. Peter's Episcopal Church Swift, Philetus, House US Post Office-Canandaigua US Post Office-Geneva Valentown Hall Warner, Oliver, Farmstead Warren-Benham House Washington Street Cemetery Wheeler, George and Addison, House (Additional Documentation) Wilder Cemetery Woodlawn Cemetery
The first African-American woman to earn a medical degree in the United States, Dr. Rebecca Lee Crumpler, studied at the New England Female Medical College in Boston, but she completed her clinical studies at the New York Infirmary for Women and Children in Manhattan in 1864.
Ontario County, located in the western region of the state of New York, has a rich and diverse history. The area was originally inhabited by various Native American tribes, including the Seneca, Cayuga, and Onondaga. European settlement began in the late 18th century when pioneers, mainly from New England, started to establish farms and communities in the area.

In 1789, Ontario County was officially founded, named after Lake Ontario which borders its northern edge. The county's first seat was located in Canandaigua, a thriving town that quickly became a center of trade and commerce in the region. During the early 19th century, Canandaigua gained prominence as the county seat and attracted many influential figures, including political leaders and social reformers.

The region played a significant role in the women's suffrage movement in the late 19th and early 20th centuries. Susan B. Anthony, a prominent suffragist, resided in Ontario County for several years and organized influential suffrage conventions in the area. Canandaigua was also home to the Ontario County Courthouse, where the famous trial of Susan B. Anthony took place in 1873, resulting in her conviction for voting illegally.

Ontario County has experienced growth and development throughout the 20th century and into the present day. The area's diverse economy includes agriculture, manufacturing, healthcare, and tourism. Today, the county is known for its picturesque landscapes, historical sites, and attractions such as the Finger Lakes wine region, making it a popular destination for visitors and residents alike.

This timeline provides a concise overview of the key events in the history of Ontario County, New York.

  • 1789 - Ontario County is established as one of the original counties in New York State.
  • 1790 - The first permanent settlement is established in Canandaigua, the current county seat.
  • 1794 - Ontario County Courthouse is built in Canandaigua.
  • 1802 - Rochester becomes part of Ontario County.
  • 1821 - Monroe County is created, separating from Ontario County.
  • 1823 - Yates County is created, further reducing the size of Ontario County.
  • 1840s - The railroad arrives in Ontario County, stimulating economic growth.
  • 1874 - Ontario County Courthouse burns down and is later rebuilt.
  • 1900s - Ontario County becomes known for its agricultural production, particularly grape growing and winemaking.