How Long Is the Great Wall of China?

Written by Anthony
Last update June 6, 2025

The Great Wall stretches over 21,000 km across China, built across centuries by different dynasties. Learn the history and facts behind its full length.

Question: How Long Is the Great Wall of China?

Quick Answer: The total length of all known sections of the Great Wall—including walls, trenches, natural defenses, and watchtowers—is approximately 21,196 kilometers.

1. Official Total Length: 21,196.18 km (13,171 miles)

According to China’s State Administration of Cultural Heritage (2012 survey), the total length of all known sections of the Great Wall—including walls, trenches, natural defenses, and watchtowers—is approximately 21,196 kilometers.

That’s roughly:

Over 13,000 miles
More than half the Earth’s circumference
Equal to traveling from New York to Los Angeles and back 4 times

2. Why So Long? — A Historical Patchwork

The Great Wall wasn’t built in one go. Different dynasties contributed over centuries:

Warring States Period (475–221 BCE): Regional kingdoms built defensive walls independently.
Qin Dynasty (221–206 BCE): Emperor Qin Shi Huang connected several walls to form the early “10,000-li Wall.”
Han Dynasty (202 BCE – 220 CE): Extended far west to protect trade routes like the Silk Road.
Ming Dynasty (1368–1644): Rebuilt and fortified over 8,800 km, including the iconic stone and brick sections near Beijing.

The “10,000 li” (roughly 5,000 km) is a symbolic term—used historically to represent vast distance.

3. Visualizing the Length: Big Numbers, Real Meaning

Geographic span: The Wall crosses 15 provinces, from Liaoning in the east to Gansu in the west.
Longest preserved section: Ming Dynasty wall, ~8,851 km
Famous parts:
- Badaling (Beijing): ~20.7 km, with 7.5 km open to tourists
- Mutianyu (Beijing): ~5.4 km total
- Jiayuguan (Gansu): Westernmost stronghold

4. What’s Included in the Measurement?

The 21,196 km total includes:

Wall segments: 6,259.6 km
Trenches and moats: 359.7 km
Natural barriers (mountains, rivers): 2,232.5 km
Towers, fortresses, and passes: Thousands, many still visible

Different surveys may report shorter lengths (~8,800 km) if they only include Ming-era walls.

5. Why Is It So Hard to Measure?

Varied terrain: Parts of the Wall run across deserts, mountains, and grasslands.
Erosion and collapse: Older walls, like those made from tamped earth in the Han or Qin era, have eroded into barely visible ridges.
Overgrowth: Many parts are buried under vegetation or lost to sand and time.
Ongoing discoveries: Satellite imagery and archaeology continue to reveal new segments.

Anthony

I’m Anthony, the founder and editor of The China Journey. I create practical, experience-based guides covering travel, food, and culture across China, with a focus on helping international travelers make clear planning decisions.