Jethro Johnson McCullough (March 8, 1810 – May 25, 1878) was an American politician and businessman from Maryland.
He served as a member of the Maryland House of Delegates, representing Cecil County from 1865 to 1867.
At the age of eight, McCullough worked at his father's carpet and coverlet weaving shop.
[1][2] On February 2, 1847, McCullough purchased a large property in North East, Maryland, and moved there in March of that year.
In 1856, McCullough purchased the "Stony Chase" property near North East and built the Shannon Mill.
In 1863, a steam mill in North East was established to manufacture iron.
[2] He served as a member of the Maryland House of Delegates, representing Cecil County, from 1865 to 1867.