During the tenure of the 15th Lok Sabha, 71% of bills were referred to Parliamentary committees for examination^[4][5]

• Speaker: Meira Kumar, INC, Sasaram, Bihar
• Deputy Speaker: Kariya Munda, BJP, Khunti, Jharkhand
• Leader of the House: Pranab Mukherjee, INC, Jangipur, West Bengal (May, 2009 - 2012) (He went on to become the 13th President of India in 2012)

Sushil Kumar Shinde, INC, Solapur, Maharashtra (2012 - May, 2014)

• Leader of the Opposition: Sushma Swaraj, BJP, Vidisha, Madhya Pradesh
• Secretary General:
  • P.D.T. Achary^[6]
  • T. K. Viswanathan

Number of members by the alliance in Lok Sabha edit

Members of the 15th Lok Sabha by political party and alliance:^{[7][8][9][10][11][12][13]}

List of members by political party edit

Members by political party in 15th Lok Sabha are given below^[14]-

Cabinet edit

United Progressive Alliance Cabinet by party edit

Source: Various news organisations^{[16][17][18][19]}
The new United Progressive Alliance (UPA) included 79 members, 78 members in the cabinet plus Prime Minister Manmohan Singh. The first 20 cabinet ministers including Manmohan Singh, swore in on 22 May 2009, while the other 59 cabinet members swore in on 27 May 2009. The 5 non-Congress cabinet ministers, include M.K. Azhagiri from the DMK. Mukul Roy from Trinamool Congress, Sharad Pawar from Nationalist Congress Party, and Farooq Abdullah from National Conference represent the other non-Congress cabinet ministers.

United Progressive Alliance cabinet by states edit

Source: The Hindu^[20][21]

• MoS (I) – Ministers of State with Independent charge

The below list only covers seats whose vacancies were filled through by-elections. Conventionally, vacancies occurring with less than a year to go for the conclusion of the term, are generally left vacant for the remainder of the term. In the case of the 15th Lok Sabha, this means that by-elections would not have been held for vacancies post June 2013, with less than a year to go for the 2014 election. Only vacancies for which by-elections were held, i.e, occurring prior to May 2013, are mentioned here.

• A total of 19 by-elections across seats in 11 different states were held through the duration of the 15th Lok Sabha, with the first in November 2009 and the last in August 2013.
• 6 of these by-elections were necessitated by the death of the incumbent MP, and 13 due to resignation.
• Of the 13 resignations, 1 was for vacating a second seat, 6 for becoming Chief Ministers of different states, 1 for becoming President, 2 for becoming MLAs and 3 due to party defections.
• In May 2009, Firozabad fell vacant due to the resignation of Samajwadi Party MP Akhilesh Yadav as he preferred to retain Kannauj after winning two seats in the 2009 election. Raj Babbar of Indian National Congress won the seat in the by-election.^[22]
• In June 2010, Banka fell vacant due to the death of independent MP Digvijay Singh. His widow Putul Kumari won the seat as an independent in the by-election.
• In November 2010, Kadapa fell vacant due to the resignation of Congress MP Y. S. Jagan Mohan Reddy, who also resigned his party membership. He contested the seat again in the by-elections on a YSR Congress Party ticket and won.
• In February 2011, Jamshedpur fell vacant due to the resignation of Bharatiya Janata Party MP Arjun Munda, as he became Chief Minister of Jharkhand. Ajoy Kumar of Jharkhand Vikas Morcha (Prajatantrik) won the seat in the by-election.
• In March 2011, Bastar fell vacant due to the death of BJP MP Baliram Kashyap. His son Dinesh Kashyap of BJP won the seat in the by-election.
• In June 2011, Hisar fell vacant due to the death of Haryana Janhit Congress MP Bhajan Lal Bishnoi. His son Kuldeep Bishnoi of HJC won the seat in the by-election.
• In October 2011, Kolkata Dakshin fell vacant due to the resignation of All India Trinamool Congress MP Mamata Banerjee, as she became Chief Minister of West Bengal, after the 2011 West Bengal Legislative Assembly election. Subrata Bakshi of Trinamool Congress won the seat in the by-election.
• In November 2011, Udupi-Chikkamagaluru fell vacant due to the resignation of BJP MP D. V. Sadananda Gowda, as he became Chief Minister of Karnataka. K. Jayaprakash Hegde of Congress won the seat in the by-election.
• In February 2012, Nellore fell vacant due to the resignation of Congress MP Mekapati Rajamohan Reddy, who also resigned his party membership. He contested the seat again in the by-elections on a YSR Congress Party ticket and won.
• In May 2012, Kannauj fell vacant due to the resignation of SP MP Akhilesh Yadav, as he became Chief Minister of Uttar Pradesh, after the 2012 Uttar Pradesh Legislative Assembly election.^[23] His wife, Dimple Yadav of SP was elected unopposed from the seat in the by-elections.^[24]
• In July 2012, Jangipur fell vacant due to the resignation of Congress MP Pranab Mukherjee, who also resigned his party membership, as he became President of India, after his victory in the 2012 Indian presidential election. His son Abhijit Mukherjee of Congress won the seat in the by-election.
• In July 2012, Tehri Garhwal fell vacant due to the resignation of Congress MP Vijay Bahuguna, as he became Chief Minister of Uttarakhand, after the 2012 Uttarakhand Legislative Assembly election. Mala Rajya Laxmi Shah of BJP won the seat in the by-election.
• In January 2013, Mandi fell vacant due to the resignation of Congress MP Virbhadra Singh, as he became Chief Minister of Himachal Pradesh, after the 2012 Himachal Pradesh Legislative Assembly election. His wife Pratibha Singh of Congress won the seat in the by-election.
• In January 2013, Porbandar fell vacant due the resignation of Congress MP Vitthalbhai Radadiya, as he became an MLA in the Gujarat Legislative Assembly, after his victory from Dhoraji in the 2012 Gujarat Legislative Assembly election. However, he soon after resigned as MLA too, as well as his party membership. He contested the Lok Sabha seat again in the by-election on a BJP ticket and won.
• In January 2013, Maharajganj, Bihar fell vacant due to the death of Rashtriya Janata Dal MP Umashankar Singh. Prabhunath Singh of RJD won the seat in the by-election.
• In March 2013, Banaskantha fell vacant due to the death of Congress MP Mukesh Gadhvi. Haribhai Chaudhary of BJP won the seat in the by-election.
• In April 2013, Howrah fell vacant due to the death of Trinamool Congress MP Ambica Banerjee. Prasun Banerjee of Trinamool Congress, a retired football player-turned-politician, won the seat in the by-election.
• In May 2013, Mandya fell vacant due to the resignation of Janata Dal (Secular) MP N. Chaluvaraya Swamy, as he became an MLA in the Karnataka Legislative Assembly, after his victory from Nagamangala in the 2013 Karnataka Legislative Assembly election. Divya Spandana of Congress won the Lok Sabha seat in the by-election.
• In May 2013, Bengaluru Rural fell vacant due to the resignation of JDS MP H. D. Kumaraswamy, as he became an MLA in the Karnataka Legislative Assembly, after his victory from Ramanagara in the 2013 Karnataka Legislative Assembly election. D. K. Suresh of Congress won the Lok Sabha seat in the by-election.

• Lok Sabha website
• List of winning candidates published by election commission of india on 17 May 2009.
• Tracking activity of MPs in Parliament

• "A legislative history of the 15th Lok Sabha" – The Hindu (April 8, 2015)