After attending Kansas State Agricultural College, Salter moved with her husband to the town of Argonia, Kansas, and became the first woman to have a baby there. Following the city's incorporation in 1885, her father was elected to be its first mayor. Two years later, while serving as an officer in the local Women's Christian Temperance Union and caring for her family, she was placed on the ballot as a mayoral candidate and became the first female mayor elected in the US.
How long was her term?
Source: Susanna M. Salter, First Female US Mayor, Elected (1887) (http://encyclopedia.thefreedictionary.com/Susanna+M.+Salter)