John Sluyter Wirt (November 16, 1851 – May 17, 1904) was an American politician and lawyer from Maryland.

Wirt moved at a young age with his family to a house on Bridge Street in Elkton, Maryland.

He graduated with a Bachelor of Arts from St. John's College in Annapolis, Maryland in 1872.

[1][2][3] Wirt started practicing law in Baltimore with partner General L. Allison Wilmer.

The law firm would later dissolve and Wirt would remain the counselor for the Baltimore and Ohio Railroad.

In 1892, Wirt was a candidate for the United States Senate, but withdrew from the ballot in support of Charles Hopper Gibson.

[1][2][3] In 1897, Wirt was elected to the Maryland House of Delegates, representing Cecil County.