Jared Diamond writes in one of his bestseller books that native North Americans had cities before the colonist times but by the time European settlers arrived diseases killed most of the population and thus the cities they had disappeared or became empty. I think it was in Guns, Germs, and Steel and he must have used some source from it. If I remember correctly it might have been a tent city but still resembling a city as they had high density. Is it true? Thanks!
I think that Guns Germs and Steel is a good credible source, at least for the facts presented, like the presence of cities, historical timelines etc.
But besides this, here are some examples for Native American cities/pueblas in North America:
Cahokia was the largest and most influential urban settlement in the Mississippian culture which developed advanced societies across much of what is now the Southeastern United States, beginning more than 500 years before European contact. Cahokia's population at its peak in the 1200s was among the largest cities in the world, and its ancient population would not be surpassed by any city in the United States until the late 18th century. Today, Cahokia Mounds is considered the largest and most complex archaeological site north of the great Pre-Columbian cities in Mexico.
- Mesa Verde
- Puye Cliff Dwellings
- Taos Pueblo
- Acoma Pueblo
Between AD 900 and 1150, Chaco Canyon was a major center of culture for the Ancient Pueblo Peoples. Chacoans quarried sandstone blocks and hauled timber from great distances, assembling fifteen major complexes which remained the largest buildings in North America until the 19th century. Evidence of archaeoastronomy at Chaco has been proposed, with the "Sun Dagger" petroglyph at Fajada Butte a popular example. Many Chacoan buildings may have been aligned to capture the solar and lunar cycles, requiring generations of astronomical observations and centuries of skillfully coordinated construction
Don't forget the Aztecs and Tenochtitlan
The most common estimates put the population at over 200,000 people. One of the few comprehensive academic surveys of Mesoamerican city and town sizes arrived at a population of 212,500 living on 13.5 km2 (5.2 sq mi),although some popular sources put the number as high as 350,000.
Here is some data from Canada (emphasis mine), quoting from Prehistory - The Canadian Encyclopedia:
The first crop to appear was maize, which began to be cultivated in southern Ontario about 1500 years ago and was a major supplement to a hunting and gathering economy. The early maize farmers occupied relatively permanent villages of multifamily wood and bark houses, often fortified with palisades as protection from the warfare that appears to have intensified with the introduction of agriculture. By 1350 AD beans and SQUASH were added to local agriculture, providing a nutritionally balanced diet that led to a decrease in the importance of hunting and gathering of wild foods (see PALYNOLOGY; PLANTS, NATIVE USES). At the time of European contact this agricultural lifestyle was characteristic of the Iroquoian peoples who occupied the region from southwestern Ontario to the middle St Lawrence Valley. It is the only region of Canada in which prehistoric agriculture was established as the local economic base, and was the area of greatest aboriginal population density.
The late prehistoric Iroquoians lived in villages composed of large multifamily LONGHOUSES, with some of the larger communities containing more than 2000 people. Wide-ranging social, trade and political connections spanned their area of occupation, as a complement to the warfare which occupied much of their attention. These patterns intensified with the appearance of Europeans and European trade goods during the 17th century, and eventually led to the destruction of the Canadian Iroquoians during the mid-17th century at the hands of their IROQUOIS neighbours to the south of Lake Ontario.
A size of 2000 might count as a city -- for example most of the cities in England were about that size of population, in the 14th century.