How Big Is a Section of Land? Acres, Square Feet, and More

A section (U.S. Public Land Survey System) equals:

• 640 acres
• 27,878,400 square feet (640 × 43,560 sq ft/acre)
• 1 square mile (exactly)
• ~2.59 km²

Sections are subdivided into quarter-sections (160 acres), quarter-quarter sections (40 acres), etc.