德里（印地语：दिल्ली；乌尔都语：دہلی‎ 或 دلّی‎；旁遮普语：ਦਿੱਲੀ）是仅次于孟买的印度第二大城市，人口1675万，官方语言为印地语、旁遮普语和乌尔都语。该城市位于北印度，地处亚穆纳河沿岸。其政治地位为直属联邦政府的直辖区，全称为德里国家首都辖区（National Capital Territory of Delhi）。根据1991年印度议会的一项修正案，德里获得了本级议会有限的立法权限。德里大都会包括3个直辖市，即德里、新德里和德里坎登门，下辖214个村。

作为古印度历代首都和自北印度到恒河平原古老贸易路线的主要城市，德里在历史的长河中留下了众多的古迹、遗迹和遗址。旧城区曾在相当长的时间内为莫卧儿帝国的首都，印度摆脱英国殖民统治以后新德里成为联邦首都，自此德里渐渐发展为大都会，汇集印度各族人民。德里也和世界其他大城市一样，随着城市的扩张，带来了环境污染、交通堵塞和资源短缺等问题；印度独立以后德里城市的快速发展，居民的收入迅速提高，但随之而来就是使得德里丧失了原有文化特质。

Delhi (/ˈdɛli/, Hindustani pronunciation: [d̪ɪlliː] Dilli; Devanāgarī: दिल्ली), officially the National Capital Territory of Delhi, is the capital territory of India. Delhi is historically and culturally connected to both the Upper Doab of the Yamuna-Ganges river system and the Punjab region. It is bordered by Haryana on three sides and by Uttar Pradesh to the east. It is the largest city in India in terms of geographical area—about 1,484 square kilometres (573 sq mi). It has a population of about 16.3 million, making it the second most populous city and second most populous urban agglomeration in India and 3 largest urban area in the world. Such is the nature of urban expansion in Delhi that its growth has expanded beyond the NCT to incorporate towns in neighbouring states and at its largest extent can count a population of about 25 million residents as of 2014. After Mumbai, Delhi has the second-highest number of billionaires and millionaires among all cities in India.