Hazardville is a section of the town of Enfield, Connecticut, United States, in Hartford County.

[2] Hazardville originated as an industrial village centered around the manufacture of gunpowder using water power from the Scantic River.

[5] The Hazardville CDP includes, in addition to the original Hazardville village, newer suburban developments east of the Central New England Railroad line to the Somers town line.

According to the United States Census Bureau, the CDP has a total area of 3.3 square miles (8.5 km2), all land.

One parcel of the Scantic River State Park is in the Powder Hollow portion of Hazardville.