The density of population in this city is very high.

这个城市的人口密度非常高。

youdao

In serious rocky desertification area, the indexes of density of population, gathering degree of peasants, workforce quantity are relatively lower.

在石漠化严重的地区，人口密度、农户居住的聚集程度、单位面积上的劳动力数量等人口指标相对较低。

youdao

The population density of that country is 685 per square mile.

那个国家的人口密度为每平方英里685人。

《新英汉大辞典》

Its deadliness was linked, among other things, to the weakness of buildings, the depth of the quake, the density of population, the fault and soil types, and the intensity of the shaking.

ECONOMIST: Why the Kashmir earthquake happened and what might be done

And that was at a time when the congestion arising from development and population density of the area was nothing like what it is today.

CENTERFORSECURITYPOLICY: Welcome to Faisal County

For Riis, the slum's biggest problem wasn't population density, lack of sunlight or even disease.

FORBES: Magazine Article