India's capital, Delhi, ranks second with 34 million residents. Delhi's population has grown by 2.54 percent. Delhi also ...

Nigeria has 89 million people living in poverty, second only to India. Economist Yemi Kale blames delayed reforms and poor policies for the crisis.

The United States could see its population decline in 2025 for the first time in history, driven by falling immigration and ...

For mental health and accessible care, New York, Hawaii and New Jersey rank highest, a new report has found. Learn why, and ...