Heft or HEFT can mean:

• Heart of England NHS Foundation Trust, a health service body in England
• Heterogeneous Earliest Finish Time, a scheduling algorithm
• High-Energy Focusing Telescope, an experiment in X-ray astronomy
• Homestead Extension of Florida's Turnpike, a road in the United States
• Heft or Hefting, a term in sheep husbandry

The Homestead Extension of Florida's Turnpike (HEFT), designated as the Ronald Reagan Turnpike and originally known as the West Dade Expressway, is a north–south free-flow toll road southern extension of the similarly tolled Florida's Turnpike. The expressway runs around the west and north sides of the Greater Miami area, extending from U.S. Route 1 in Florida City (near Homestead) to the Turnpike mainline four miles north of the Golden Glades Interchange. The road carries the hidden designation of State Road 821 (SR 821). It was opened in stages between 1973 and 1974, after the main line of the Turnpike was completed, and is used by both commuters and travelers to the Florida Keys and Everglades National Park. Due to its path, it acts as a de facto outer beltway for Miami. Unlike other Florida's Turnpike Enterprise highways, it is treated as if it were part of Florida's Turnpike mainline by highway signs and exit numbers, despite its separate state road number.