How long is the Great Wall of China? Total Length is 21,196km
https://www.travelchinaguide.com/china_great_wall/facts/how-long.htm
Mar 31, 2022 · Total Length - 21,196 kilometers (13,170 miles) Many ancient dynasties have participated in building the Wall, and many sections are located in remote mountains, grassland or deserts which make the measurement a problem. Thanks to modern measuring techniques, and after a 5-year archaeological survey, the total length has been finally revealed.