What were the names of the world's earliest planned cities?

The Indus Valley civilization cities of Mohenjo-daro and Harappa are believed to be the world’s earliest planned cities. They were laid out in a grid-like pattern similar to modern day cities such as New York.

The Indus Valley civilization had some of the most well-planned cities in the world at the time. It was a Bronze Age civilisation emerging from the river valleys of modern-day Punjab and Sindh They lasted from 3300 BCE to 1300 BCE, and in its mature form from 2600 BCE to 1900 BCE

For further reading check the following articles:

• Prehistoric Age in India
• Indus Valley Civilization
• Prehistoric Rock Painting