A small summer stock theatre operated during the 1920s, in which actors such as John Kenley performed.

In 1972, Muhammad Ali set his training camp in Deer Lake, and it still stands today complete with an indoor boxing ring.

Pennsylvania Route 61 is the principal highway passing through Deer Lake.

The racial makeup of the borough was 98.30% White, 0.19% Native American, 1.33% Asian, and 0.19% from two or more races.

18.2% of all households were made up of individuals, and 6.9% had someone living alone who was 65 years of age or older.