Constituency-Level Elections Archive provides machine-readable datasets of voting results at a constituency level for the lower house legislative elections that have been conducted around the world.
Constituency-Level Elections (CLE) dataset provides national and subnational election data at the district level of government for democratic countries around the world.
Election Results by Country is a list compiled by Wikipedia. Provides a helpful starting point and list of all countries in one place.
Psephos – Adam Carr’s Election Archive includes election statistics from 176 countries displayed geographically and broken down into local political regions. Has a special section on Australia.