|National American Woman Suffrage Association, “Votes for women,” Digital Public Library of America, http://dp.la/item/1847d71e7f95e296350b3a503e150c80. Courtesy of the University of Virginia Library|
When it was ratified in 1920, the Nineteenth Amendment to the United States Constitution granted the right to vote to women. Before that time, some states had passed legislation allowing women to vote, beginning with Wyoming in 1869...
Western territories such as Colorado, Utah, and California followed Wyoming's example in the years from 1869 to 1911. Women gained limited suffrage rights from other states and municipalities, such as Kentucky, which gave widows with children the right to vote in school elections as early as 1838.
During the women's suffrage movement, New Jersey became a rallying point for the early suffragists in their demonstrations and court cases. Interestingly, New Jersey had given women who met the enumerated requirements the right to vote in its 1776 constitution.
After you determine when your state granted female suffrage, start looking at voting records. Find these by doing a search on the FamilySearch Catalog, Ancestry.com or a state archive or library.