William T. A. Fitzgerald (December 19, 1871 – February 24, 1948) was an American politician from Boston who served as Register of Deeds of Suffolk County, Massachusetts from 1906 to 1946.

While he was a small child, Fitzgerald's family moved to the South Cove section of the city.

During his youth, Fitzgerald was a pitcher for the South Cove Maroons amateur baseball team.

During his tenure, Fitzgerald drafted bills that authorized short forms of deeds and mortgages, protected rights of plaintiffs in attachment cases, prevented mortgage fraud, authorized direct transfer of real estate between spouses, and gave married partners equal rights in the real estate of the other.

[4] Fitzgerald died on February 24, 1948, at a convalescent hospital in Newton, Massachusetts.