Conowingo is a community in northwestern Cecil County, Maryland, United States.

Conowingo was at the rapids that were the first navigation obstacle on the Susquehanna upstream of the Chesapeake Bay, the location of an early stretch of canal.

In the decade before a utility harnessed the power of the river, the thriving place had a population of 350 people, according to the Maryland State Gazetteer for 1902-02.

C. Bell, saw and flour mill; and the Susquehanna Paper Co.  A daily stage provided transportation to Rowlandsville, Berkley, Darlington, Delta and other places.

At the completion of the dam in 1928, farmers and villagers uprooted by the construction of the large hydroelectric facility gathered on the hillside to watch as the village met its water doom and old Conowingo slowly vanished beneath the water.

A new town, named Conowingo Village, was created in 1928, on the Harford County side of the dam.