Hilliard is a town in Nassau County, Florida, United States; northwest of Jacksonville.

Hilliard was named "2003 Rural Community of the Year" by former Florida governor Jeb Bush, for its collaboration with the YMCA to establish a local chapter, which included a swimming pool and exercise facility.

According to the United States Census Bureau, the town has a total area of 5.5 square miles (14 km2), all land.

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

As of the 2020 United States census, there were 2,967 people, 1,202 households, and 883 families residing in the town.

[8] As of the 2010 United States census, there were 3,086 people, 1,016 households, and 739 families residing in the town.

Along with Callahan, Hilliard is one of the major economic centers of western Nassau County.

Because of specific soil conditions and a great deal of open rural land in the area, Hilliard was at one time considered by the Department of Energy as a possible site for the Superconducting Super Collider; however, that never materialized.

Hilliard lies at the intersection of County Road 108 and US 1, which is also part of US 301 and US 23 as it runs south from the St. Mary's River to Callahan.

CR 108 is known as Second Street while passing through Hilliard; at this intersection is the only complete set of traffic signals in the town.

There is also a blinking yellow light approximately two miles south, at the intersection of Old Dixie Highway and US 1.