Washington Irving Stringham (December 10, 1847 – October 5, 1909) was an American mathematician born in Yorkshire, New York.

, made up of the initial letters of logarithm and of natural or Napierian.

His dissertation was titled Regular Figures in N-dimensional Space[2] under his advisor James Joseph Sylvester.

In 1881 he was in Schwartzbach, Saxony, when he submitted an article on finite groups found in the quaternion algebra.

[4] In 1893 in Chicago, his paper Formulary for an Introduction to Elliptic Functions was read at the International Mathematical Congress held in connection with the World's Columbian Exposition.

The couple raised a daughter, Martha Sherman Stringham, (March 5, 1891- August 7, 1967).