17th Parliament of Ontario
The 17th Legislative Assembly of Ontario was in session from December 1, 1926, until September 17, 1929, just prior to the 1929 general election. The majority party was the Ontario Conservative Party led by George Howard Ferguson.
William David Black served as speaker for the assembly.
| Riding | Member | Party |
| Addington | William David Black | Conservative |
| Algoma | John Morrow Robb | Conservative |
| Beaches | Thomas Alexander Murphy | Conservative |
| Bellwoods | William Henry Edwards | Conservative |
| Bracondale | Arthur Russell Nesbitt | Conservative |
| Brant County | Harry Corwin Nixon | Progressive |
| Brantford | William George Martin | Conservative |
| Brockton | Frederick George McBrien | Conservative |
| Brockville | Hezekiah Allan Clark | Conservative |
| Bruce North | Alexander Patterson Mewhinney | Liberal |
| Bruce South | Malcolm Alex McCallum | Progressive |
| Foster Graham Moffatt | Conservative | |
| Carleton | Adam Holland Acres | Conservative |
| Cochrane North | Albert Victor Waters | Conservative |
| Cochrane South | Alfred Franklin Kenning | Conservative |
| Dovercourt | Samuel Thomas Wright | Conservative |
| Dufferin | Thomas Kerr Slack | Progressive |
| Dundas | George Smyth | Liberal-Prohibitionist |
| Durham | William John Bragg | Liberal |
| Eglinton | Herbert Henry Ball | Conservative |
| Elgin East | Edward Blake Miller | Liberal |
| Elgin West | Findlay George MacDiarmid | Conservative |
| Essex North | Paul Poisson | Conservative |
| Essex South | Charles George Fletcher | Liberal |
| Fort William | Franklin Harford Spence | Conservative |
| Frontenac—Lennox | Edward Ming | Liberal |
| Glengarry | Angus McGillis | Conservative |
| Greenwood | George Joseph Smith | Conservative |
| Grenville | George Howard Ferguson | Conservative |
| Grey North | David James Taylor | Progressive |
| Grey South | Farquhar Robert Oliver | United Farmers |
| Haldimand | Robert Francis Miller | Liberal |
| Halton | George Hillmer | Conservative |
| Hamilton Centre | Thomas William Jutten | Conservative |
| Hamilton East | Leeming Carr | Conservative |
| William Morrison | Conservative | |
| Hamilton West | Frederick Thomas Smye | Conservative |
| Hastings East | James Ferguson Hill | Conservative |
| Hastings North | John Robert Cooke | Conservative |
| Hastings West | William Henry Ireland | Conservative |
| High Park | William Alexander Baird | Conservative |
| Huron North | Charles Alexander Robertson | Liberal |
| Huron South | William George Medd | United Farmers |
| Kenora | Joseph Pattulo Earngey | Conservative |
| Kent East | Christopher Gardiner | Progressive |
| Kent West | Archibald Clement Calder | Conservative |
| Kingston | Thomas Ashmore Kidd | Conservative |
| Lambton East | Leslie Warner Oke | United Farmers |
| Lambton West | Wilfred Smith Haney | Conservative |
| Lanark North | Thomas Alfred Thompson | Conservative |
| Lanark South | Egerton Reuben Stedman | Conservative |
| Leeds | Frederick James Skinner | Conservative |
| Lincoln | Robert Henry Kemp | Progressive |
| London North | James Percy Moore | Conservative |
| London South | John Cameron Wilson | Conservative |
| Manitoulin | Thomas Farquhar | United Farmers |
| Middlesex North | Alexander Daniel McLean | Independent-Progressive |
| Middlesex West | John Giles Lethbridge | Progressive |
| Muskoka | George Walter Ecclestone | Conservative |
| Niagara Falls | William Gore Willson | Conservative |
| Nipissing | Henri Morel | Conservative |
| Norfolk | John Strickler Martin | Conservative |
| Northumberland | William George Robertson | Liberal |
| Ontario North | John Wesley Widdifield | United Farmers |
| Ontario South | William Edmund Newton Sinclair | Liberal |
| Ottawa East | Joseph Albert Pinard | Liberal |
| Ottawa North | Albert Edwin Honeywell | Conservative |
| Ottawa South | Thomas Miles Birkett | Conservative |
| Oxford North | David Munroe Ross | Liberal-Progressive |
| Oxford South | Merton Elvin Scott | Liberal-Progressive |
| Parkdale | William Herbert Price | Conservative |
| Parry Sound | George Vernon Harcourt | Conservative |
| Peel | Thomas Laird Kennedy | Conservative |
| Perth North | Joseph Dunsmore Monteith | Conservative |
| Perth South | Albert Alexander Colquhoun | Conservative |
| Peterborough City | William Herbert Bradburn | Conservative |
| Peterborough County | William Alfred Anderson | Liberal |
| Port Arthur | Donald McDonald Hogarth | Conservative |
| Prescott | Edmond Proulx | Independent-Liberal |
| Prince Edward | William Edgar Raney | United Farmers |
| Horace Stanley Colliver | Conservative | |
| Rainy River | James Arthur Mathieu | Conservative |
| Renfrew North | Alexander Stuart | Conservative |
| Edward Arunah Dunlop | Conservative | |
| Renfrew South | Thomas Moore Costello | Conservative |
| Riverdale | George Oakley | Conservative |
| Russell | Aurélien Bélanger | Liberal |
| Sault Ste. Marie | James Lyons | Conservative |
| Simcoe Centre | Charles Ernest Wright | Conservative |
| Simcoe East | William Finlayson | Conservative |
| Simcoe Southwest | John Henry Mitchell | Liberal-Progressive |
| St. Andrew | William Robertson Flett | Conservative |
| St. Catharines | Edwin Cyrus Graves | Conservative |
| St. David | Joseph Elijah Thompson | Conservative |
| St. George | Henry Scholfield | Conservative |
| St. Patrick | John Allister Currie | Conservative |
| Stormont | Duncan Alexander McNaughton | Conservative |
| Sturgeon Falls | Théodore Legault | Independent-Liberal |
| Sudbury | Charles McCrea | Conservative |
| Timiskaming | Angus John Kennedy | Conservative |
| Victoria North | William Newman | Liberal |
| Victoria South | Frederick George Sandy | Liberal-Progressive |
| Waterloo North | William George Weichel | Conservative |
| Waterloo South | Karl Kenneth Homuth | Labour |
| Welland | Marshall Vaughan | Conservative |
| Wellington Northeast | George Alexander McQuibban | Liberal |
| Wellington South | Lincoln Goldie | Conservative |
| Wellington West | William Clarke Chambers | Conservative |
| Wentworth North | Alex Laurence Shaver | Conservative |
| Wentworth South | Thomas Joseph Mahony | Conservative |
| Windsor East | Frank Worthington Wilson | Conservative |
| Windsor West | John Frederick Reid | Conservative |
| Woodbine | George Sylvester Shields | Conservative |
| York East | George Stewart Henry | Conservative |
| York North | Peter William Pearson | Liberal |
| York South | Leopold Macaulay | Conservative |
| York West | Forbes Godfrey | Conservative |