Quinby is a town in Florence County, South Carolina, United States.

[6] It is bordered on the south and west by the city of Florence, the county seat.

The town limits extend north to Black Creek, a tributary of the Pee Dee River.

According to the United States Census Bureau, the town has a total area of 1.4 square miles (3.5 km2), all land.

22.1% of all households were made up of individuals, and 8.8% had someone living alone who was 65 years of age or older.