The Lincoln Memorial Reflecting Pool is the largest of Washington, D.C.'s reflecting pools. Located directly east of the Lincoln Memorial, it is a long, rectangular pool visible in many photographs of the Washington Monument. It is lined by walking paths and shade trees on both sides. It reflects both the Washington Monument and the Lincoln Memorial.

Located on the west end of the National Mall, the reflecting pool is approximately 2,029 feet (618 m) long and 167 feet (51 m) wide. It has a depth of approximately 18 inches (46 cm) on the sides and 30 inches (76 cm) in the center. It holds approximately 6,750,000 U.S. gallons (25,500,000 L) of water.

A reflecting pool or reflection pool is a structure often used in memorials. It generally consists of a shallow pool of water, usually quite calm. A design with edges being slightly deeper than the center of the pool is often used to suppress wave formation. It is designed to inspire solemnity and, as its name implies, reflection.

The most famous reflecting pool by far is the one leading up to the Taj Mahal in Agra, India.

Notable reflecting pools in the United States include:

• The reflecting pool in Constitution Gardens, between the Lincoln Memorial and the Washington Monument, in Washington, D.C.
• The King Center in Atlanta, Georgia commemorating Dr. Martin Luther King, Jr.
• The Oklahoma City National Memorial, site of the Oklahoma City bombing
• At the University of Notre Dame, below the Hesburgh Library mosaic of Christ the Teacher.