Cassiar was a provincial electoral district in the Canadian province of British Columbia. It first appeared in the British Columbia general election of 1882.
| Population, 1881 | ||
| Population change, 1881-190x | ||
| Area (km2) | ||
| Population density (people per km2) |
Note: Winners in each election are in bold.|-|- bgcolor="white"!align="right" colspan=3|Total valid votes!align="right"|57!align="right"|100.00%!align="right"||- bgcolor="white"!align="right" colspan=3|Total rejected ballots!align="right"|!align="right"|!align="right"||- bgcolor="white"!align="right" colspan=3|Turnout!align="right"|%!align="right"|!align="right"||}
|-|- bgcolor="white"!align="right" colspan=3|Total valid votes!align="right"|!align="right"|100.00%!align="right"||- bgcolor="white"!align="right" colspan=3|Total rejected ballots!align="right"|!align="right"|!align="right"||- bgcolor="white"!align="right" colspan=3|Turnout!align="right"|%!align="right"|!align="right"||- bgcolor="white"!align="right" colspan=7|1 "No strictly accurate return available - the Returning Officer merely stating: 'John Grant elected by a majority of 3'." |}
|-|- bgcolor="white"!align="right" colspan=3|Total valid votes!align="right"|108!align="right"|100.00%!align="right"||- bgcolor="white"!align="right" colspan=3|Total rejected ballots!align="right"|!align="right"|!align="right"||- bgcolor="white"!align="right" colspan=3|Turnout!align="right"|%!align="right"|!align="right"||}
|-|Independent (Government?)|William Dalby|align="right"|45|align="right"|30.61%|align="right"||align="right"|unknown|- bgcolor="white"!align="right" colspan=3|Total valid votes!align="right"|147!align="right"|100.00%!align="right"||- bgcolor="white"!align="right" colspan=3|Total rejected ballots!align="right"|!align="right"|!align="right"||- bgcolor="white"!align="right" colspan=3|Turnout!align="right"|%!align="right"|!align="right"||}
|-|Independents|George Simpson McTavish|align="right"|45|align="right"|14.15%|align="right"||align="right"|unknown|- bgcolor="white"!align="right" colspan=3|Total valid votes!align="right"|318!align="right"|100.00%!align="right"||- bgcolor="white"!align="right" colspan=3|Total rejected ballots!align="right"|!align="right"|!align="right"||- bgcolor="white"!align="right" colspan=3|Turnout!align="right"|%!align="right"|!align="right"||- bgcolor="white"!align="right" colspan=7|2 Increased to a two-member seat from one.|}
Cassiar riding was eliminated in the redistribution after the 1900 election. In the 1903 election, this region was represented by the new Atlin and Skeena ridings.