Canadian blogosphere is used to describe the online predominantly English Canadian community of weblogs that is part of the larger blogosphere.

Canada has one of the highest internet penetration rates in the world. Of Canadian internet users, a recent poll suggested that over 42% had read a blog in the previous three months.

Political blogs

Main article: Political blog

Though Canadians compose blogs on many topics, weblogs of a political nature have a particularly high visibility in Canada. Former prime minister Paul Martin kept a high-profile blog during his campaign for leadership of the Liberal Party. Monte Solberg kept a widely read blog while he was in opposition, but ended blogging after being named Minister of Citizenship and Immigration. Former Jean Chrétien advisor, Warren Kinsella's blog enjoys a similarly high profile. The contents of political blogs have been used to both defend and attack politicians in Parliament. Canadian comedian Rick Mercer also keeps a blog that frequently pokes fun at Canadian politicians.

Jim Elve of Blogs Canada was the first to create a directory of Canadian blogs. After developing a rich ecosystem of individual bloggers in the early 2000s, the political part of the Canadian blogosphere began to organize itself into larger groupings based on broad political ideology (left-right politics), party alignment (New Democratic Party, Liberal, Conservative) and geographical location (province or city). Membership in several groups is common.

The largest political blog group are the right leaning Blogging Tories with 300 blogs and 3,000 readers on average every day. More recently, Liberal and NDP bloggers, many of whom are Progressive Bloggers, have joined to create Liblogs and Blogging Dippers. The environmental Green Bloggers have about 90 Canadian Bloggers. There is also a group of non-partisan Canadian bloggers, committed to no specific party, called The Blogging Alliance of Non-Partisan Canadians. There are also a number of regional blog groups, although most are non-political.

MP Garth Turner's blog is one of two active blogs by Canadian MPs. He was suspended from the Conservative caucus for breaching caucus confidentiality on his blog. MP David L. Anderson also has a blog focusing on Western Canadian agricultural issues.

Political blogs as watchdogs

Canadian bloggers in their role as citizen journalists also hold elected politicians up to increased scrutiny. The How'd They Vote? website, set up by blogger Cory Horner mines Hansard for MP's voting history, attendance records and number of words spoken in Parliament. New Democrat MP Pat Martin said this website was "serving a public function" and "motivating MPs to do a better job." Liberal MP Paul Szabo was determined to be the "parliamentary windbag” of the 38th Parliament with 107,873 words spoken.

Blogs and authority

In March 2005, fulltime Canadian tech blogger Jeremy Wright was detained and strip-searched by U.S. Immigration while crossing into the U.S. because he told officials his occupation was "blogger."