Charles M. O'Brien | |
|---|---|
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| Member of the Legislative Assembly of Alberta | |
| In office March 1909 – March 1913 | |
| Succeeded by | Robert E. Campbell |
| Constituency | Rocky Mountain |
| Personal details | |
| Born | March 2, 1875 Bell Rapids, Ontario, Canada |
| Died | February 23, 1952 (aged 76) Los Angeles County, California |
| Political party | Socialist Party of Alberta, Socialist Party of Canada |
| Occupation | activist, politician, former railway worker, miner, logger |
Charles Macnamara (Charlie) O'Brien (March 2, 1875 – February 23, 1952) was a Canadian socialist activist and politician in Alberta, Canada. He served in the Legislative Assembly of Alberta from 1909 to 1913.