Yellow Line or Line 2 was the second line of Delhi Metro to be opened in phases after the Red Line; its first section was inaugurated on December 20, 2004. It is one of the longest and busiest lines on the system, and the two busiest stations — Rajiv Chowk and Kashmere Gate — are both part of it. Yellow Line is 48.8 km long and it has 37 stations between Samaypur Badli in the north and HUDA City Centre in the south. Broad gauge (1676 mm) tracks and 25 kV AC via overhead catenary are used on the line. The frequency of the trains (comprising six or eight coaches) varies depending on the time of day, but it can be even less than 1 minute, whereas the top speed of the trains is 80 km/h.
Stations on Yellow Line
| Station | Interchange/ Connections | |
| English | Hindi | |
| Samaypur Badli | सामयपुर बादली | |
| Rohini Sector 18, 19 | रोहिणी सेक्टर 18, 19 | |
| Haiderpur Badli Mor | हैदरपुर बादली मोर | |
| Jahangirpuri | जहांगीरपुरी | |
| Adarsh Nagar | आदर्श नगर | |
| Azadpur | आजादपुर | Pink Line |
| Model Town | मॉडल टाउन | |
| GTB Nagar | जीटीबी नगर | |
| Vishwa Vidyalaya | विश्व विद्यालय | |
| Vidhan Sabha | विधानसभा | |
| Civil Lines | सिविल लाइंस | |
| Kashmere Gate | कश्मीरी गेट | Red Line; Violet Line; Kashmere Gate ISBT |
| Chandni Chowk | चांदनी चोक | Delhi Junction (Old Delhi Railway Station) |
| Chawri Bazar | चौरी बाजार | |
| New Delhi | नई दिल्ली | Orange Line; New Delhi Railway Station |
| Rajiv Chowk | राजीव चौक | Blue Line |
| Patel Chowk | पटेल चौक | |
| Central Secretariat | केंद्रीय सचिवालय | Violet Line |
| Udyog Bhawan | उद्योग भवन | |
| Lok Kalyan Marg | लोक कल्याण मार्ग | |
| Jor Bagh | जोर बाग | |
| INA | आई एन ए | Pink Line |
| AIIMS | एम्स | |
| Green Park | हरित उद्यान | |
| Hauz Khas | हौज खास | Magenta Line |
| Malviya Nagar | मालवीय नगर | |
| Saket | साकेत | |
| Qutub Minar | कुतुब मीनार | |
| Chhatarpur | छतरपुर | |
| Sultanpur | सुल्तानपुर | |
| Ghitorni | घीटोरनी | |
| Arjan Garh | अर्जन गढ़ | |
| Guru Dronacharya | गुरु द्रोणाचार्य | |
| Sikandarpur | सिकंदरपुर | Rapid Metro Gurgaon |
| MG Road | एमजी रोड | |
| IFFCO Chowk | इफको चौक | |
| HUDA City Centre | हुडा सिटी सेंटर | |
Further Extension of Yellow Line
Yellow Line is being planned to be extended deeper into the city of Gurgaon. The line, from Huda City Centre, will move further southwards through Old Gurgaon before taking a U-turn in the anti-clockwise direction. Thereafter, it would head northwards again before finally joining the Cyber City Station of Rapid Metro Gurgaon. The important stations on the extended Yellow Line would be Rajiv Chowk (Gurgaon), Udyog Vihar, Technology Park and Gurgaon Railway Station. Similarly, from Samaypur Badli, the line is being extended till Sirsapur, and a further extension from here to Narela is being planned.
Top Attractions Connected by Yellow Line
| Attraction | Nearest Station | Distance from Nearest Station (Km) |
| Delhi Police Museum | Model Town | 1 |
| Kamla Nehru Ridge | Vidhan Sabha | 1.7 |
| Red Fort | Chandni Chowk | 1.6 |
| Jama Masjid | Chandni Chowk | 1.5 |
| Chandni Chowk | Chandni Chowk | 0 |
| Connaught Place | Rajiv Chowk | 0 |
| Sacred Heart Cathedral | Patel Chowk | 1.1 |
| Jantar Mantar | Patel Chowk | 0.6 |
| Gurudwara Bangla Sahib | Patel Chowk | 0.8 |
| Janpath Market | Patel Chowk | 0.8 |
| Mughal Gardens (Rashtrapati Bhavan) | Central Secretariat | 1.8 |
| India Gate | Central Secretariat | 1.8 |
| National Museum | Udyog Bhavan | 0.9 |
| Lodhi Gardens | Jor Bagh | 1.5 |
| Safdarjung’s Tomb | Jor Bagh | 0.4 |
| Delhi Haat | INA | 0 |
Yellow Line Route Map
Other Delhi Metro Lines: Red | Blue | Green | Violet | Orange | Magenta | Grey | Pink | Rapid Metro
