William Francis Harrity (October 19, 1850 – April 17, 1912) was an American politician and lawyer.

[1] In 1870, Harrity graduated at the top of his class at La Salle College in Philadelphia, Pennsylvania earning a law degree.

He completed one year as a tutor of Latin and mathematics at La Salle while gaining his master of arts degree.

His leadership attributed to the many Democratic candidates being elected at the local and state level including Robert E. Pattison as Pennsylvania Governor in 1883.

His success led to an appointment a Pennsylvania delegate to the Democratic National Convention in 1884 and as Postmaster General for Philadelphia between 1885 and 1889 before he retired his post to become chief executive, and president of the Equitable Trust Company, 624 Chestnut Street, Philadelphia.