London and the surrounding area is made up of four ridings, London North Centre, London West, London-Fanshawe and Elgin-Middlesex-London in the 2015 federal election. Of those ridings, three were held by the Conservatives when Parliament dissolved. The fourth was held by the NDP.
Here's a breakdown of each riding.
London North Centre
Liberal candidate Peter Fragiskatos has won the riding of London North Centre, with 50.4 per cent of the popular vote.
With 75 per cent of polls reporting, Fragiskatos defeated incumbent Susan Truppe, the Conservative MP who held the riding since 2011. Truppe had 30.5 per cent of the popular vote, while NDP candidate German Gutierrez had 15 per cent.
London North Centre encompasses the city's downtown core and Western University and is home to some of the more affluent parts of London.
The riding had been held by a Liberal MP since 1997, when a vote-split in 2011 between the Liberals and the NDP saw Conservative incumbent Susan Truppe take the seat. Truppe was elected with 36.9 per cent of the vote.
- PROFILE: London North Centre
Candidates in 2015:
Conservative: Susan Truppe, has been the MP since 2011.
NDP: German Gutierrez is a professor at Fanshawe College's School of Language and Liberal Studies.
Liberal: Peter Fragiskatos is a political scientist at King's University College, an affiliate of Western University.
Green: Carol Dyck works as a freelance environmental consultant.
London West
Liberal candidate Kate Young has won the riding of London West,, with 46.1 per cent of the popular vote.
With 80 per cent of polls reporting, Fragiskatos beat incumbent Ed Holder, the Conservative MP who has held the riding since 2008. Holder had 34 per cent of the popular vote, while NDP candidate Matthew Rowlinson had 15.2 per cent.
This riding contains the western part of the city of London and stretches from the city's limits in the north and west to Dingman Creek, Southdale Road West, Wharncliffe Road South and Commissioners Road East in the south and Wonderland Road North, Oxford Street West, Wharncliffe Road North, the Thames River and the CN Rail line in the east.
The riding has been held by Conservative Ed Holder since 2008. In 2011 he was elected with 44.5 per cent of the vote.
- PROFILE: London West
Candidates in 2015:
Conservative: Ed Holder, MP since 2008.
NDP: Matthew Rowlinson is an English professor at Western University.
Liberal: Kate Young was a television news anchor and journalist at CTV London.
Green: Dimitri Lascaris is a lawyer.
London-Fanshawe
NDP candidate Irene Mathyssen has been re-elected in the riding of London-Fanshawe.
With over 60 per cent of polls reporting, Mathyssen will return to her seat in Parliament, which she won in the 2006 federal election.
Mathyssen had 38.1 per cent of the popular vote to Liberal candidate Khalil Ramal's 30.4 per cent. Conservative Candidate Suzanna Dieleman had 27.8 per cent of the popular vote.
This London-area riding takes in a broad mix of workplaces and neighbourhoods, from some rural communities, to the student-rich area surrounding Fanshawe College.
This is the city's only riding not held by a Conservative. NDP candidate Irene Mathyssen has been the MP for London-Fanshawe since 2006, when she became the first NDP to hold a seat in the city. She was re-elected in 2011 with 50.8 per cent of the vote.
- PROFILE: London-Fanshawe
Candidates in 2015:
Conservative: Suzanna Dieleman has worked in municipal finance for 20 years.
NDP: Irene Mathyssen has been the MP since 2006.
Liberal: Khalil Ramal was a Liberal MPP in London-Fanshawe from 2003 to 2011.
Green: Matthew Peloza is a chartered accountant.
Elgin-Middlesex-London
Conservative Karen Vecchio has won the riding of Elgin-Middlesex-London, taking just under 50 per cent of the vote. Liberal Lori Baldwin-Sands won 31 per cent, and NDP candidate took 15 per cent of the ballots.
Elgin-Middlesex-London is composed of much of the rural area surrounding London. The riding borders Lake Erie in the south and takes in parts of Elgin and Middlesex counties.
The riding was held by Conservative Joe Preston who was re-elected for his fourth term in 2011 with 57.3 per cent of the vote. He announced his retirement this year, so there is no incumbent in the race.
PROFILE: Elgin-Middlesex-London
Candidates in 2015:
Conservative: Karen Louise Vecchio was an independent business owner, and worked for Joe Preston.
NDP: Fred Sinclair is a custom carpenter for his family-owned business.
Liberal: Lori Baldwin-Sands was a municipal politician in St. Thomas.
Green: Bronagh Joyce Morgan is self-employed and a long-time Green Party candidate.
Check out the map below to compare local election results from 2011 and 2015, as data becomes available:
On mobile? Compare the 2011 and 2015 results for the London area here.