Blyth is 85 km (53 mi) north of London and 79 km (49 mi) west of Waterloo at the intersection of Huron County Road 4 (London Road) and Huron County Road 25 (Blyth Road). Blyth is also 24 km (15 mi) inland from Lake Huron.

The 2016 Canadian Census showed Blyth had a population of approximately 1,000 residents.

Despite its small size, Blyth has a significant national presence. The village attracts hundreds of thousands of visitors annually to its world-renowned theatre, destination craft brewery and large municipal campground. As well, Blyth has several prominent employers creating job opportunities not found in many rural regions of Canada.

Residents pronounce the name of their village “blithe” rather than “bly-eth”.