The Perkins Opera House is a 19th-century mercantile building adapted for use as a theater.

According to the United States Census Bureau, the city has a total area of 4.0 square miles (10.3 km2), all land.

The climate in this area is characterized by hot, humid summers and generally mild winters.

Monticello is the site of the highest temperature recorded in Florida, 109 °F (43 °C) on June 29, 1931.

As of the 2020 United States census, there were 2,589 people, 1,120 households, and 711 families residing in the city.

[17] As of the 2010 United States census, there were 2,506 people, 770 households, and 559 families residing in the city.