Thorndike is a town in Waldo County, Maine, United States.

[3] According to the United States Census Bureau, the town has a total area of 25.26 square miles (65.42 km2), all land.

There were 396 housing units at an average density of 15.7 per square mile (6.1/km2).

20.6% of all households were made up of individuals, and 8.8% had someone living alone who was 65 years of age or older.

There were 337 housing units at an average density of 13.3 per square mile (5.1/km2).

19.7% of all households were made up of individuals, and 6.8% had someone living alone who was 65 years of age or older.