In the early 19th century, the site of the present city was the junction of the Louisville and Nashville Pike with spur roads to Glasgow and Bardstown.

By 1827, a stagecoach relay station had developed into a settlement with a post office named Three Forks.

[4] In 1859, the mainline of the Louisville and Nashville Railroad reached the plantation, and in 1863 the Glasgow spur was completed.

When the line finally opened in 1886, Diamond was one of the primary stops on the railroad.

Excursions were available to see Diamond and Mammoth Caves on the same day, and still return to Glasgow Junction in time to catch through trains to Louisville or Nashville.

[2] In 1938, the name was changed to Park City to avoid confusion with Glasgow.

[2] Part of the former Mammoth Cave Railroad was converted into a 9-mile hike and bike trail.

37.6% of all households were made up of individuals, and 20.7% had someone living alone who was 65 years of age or older.