The land was originally owned by Eugene Sly and Nancy Stauffer.

A post office opened in Bay Shore on July 25, 1892 with Sly serving as the first postmaster.

[5] The community of Bay Shore was listed as a newly-organized census-designated place for the 2010 census, meaning it now has officially defined boundaries and population statistics for the first time.

[6] According to the U.S. Census Bureau, the Bay Shore CDP has a total area of 1.55 square miles (4.01 km2), all land.

Bay Shore is located at the fringes of three separate school districts.