[goldstategop]

They’re called ridings - both the UK and Canada have a lower house styled the House Of Commons.

[Redmen4ever]

risings in Canada, constituencies in UK and Ireland:

http://en.wikipedia.org/wiki/United_Kingdom_constituencies

http://en.wikipedia.org/wiki/Parliamentary_constituencies_in_the_Republic_of_Ireland

electorates in Australia and New Zealand:

http://en.wikipedia.org/wiki/Divisions_of_the_Australian_House_of_Representatives

http://en.wikipedia.org/wiki/New_Zealand_electorates