[3] By 1856 the iron works was recognized as one of the best of Pennsylvania in terms of quality leading to the construction of 30 to 40 buildings to support the growing workforce.

[3] Joseph Morrison, an immigrant from Castle Toothery,[a] Ireland was named the first Chief Burgess[b] and by 1880 the population reached 1,000.

[3] Around this time the mining industry was starting to fade, and the residents, who mostly spent their salaries on cheap whiskey, caused the borough to develop a reputation for rowdiness.

[3] Additionally, the residents of Glendon where notably more conservative than other laborers, opening a chapter of the Patriotic Order Sons of America which is still in operation.

[3] Despite the small size, the borough also maintained a police force and public school system.

[4] According to the U.S. Census Bureau, the borough has a total area of 0.6 square miles (1.6 km2), all land.

Students in grades nine through 12 attend Wilson Area High School in Easton.