How large is the National Capital Territory of Delhi compared with New Delhi?

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Delhi Delhi, India, designated a World Heritage site.

The National Capital Territory (NCT) of Delhi is significantly larger than New Delhi.

The NCT of Delhi encompasses a total area of approximately 573 square miles (1,483 square km), which includes the historic city of Old Delhi, the planned city of New Delhi, and surrounding metropolitan and rural regions. In contrast, New Delhi is a geographically smaller area located within the NCT, covering about 16.5 square miles (42.7 square km). While the NCT functions as a union territory with its own elected legislature, New Delhi serves specifically as a district within that territory and acts as the seat of India's central government.123