http://en.wikipedia.org/wiki/Ottawa#cite_note-community_profile-28
From 2006 census:
<table align="left"><tbody><tr bgcolor="#cccccc"><th>Ethnic Origin</th> <th>Population</th> <th>Percent</th> </tr> <tr> <td>
Canadian</td> <td>227,490</td> <td>28.4%</td> </tr> <tr style="background: rgb(239, 239, 239) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous; color: black;"> <td>
English</td> <td>194,845</td> <td>24.3%</td> </tr> <tr> <td>
Irish</td> <td>180,525</td> <td>22.5%</td> </tr> <tr style="background: rgb(239, 239, 239) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous; color: black;"> <td>
French</td> <td>172,165</td> <td>21.5%</td> </tr> <tr> <td>
Scottish</td> <td>158,340</td> <td>19.8%</td> </tr> <tr style="background: rgb(239, 239, 239) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous; color: black;"> <td>
German</td> <td>67,660</td> <td>8.4%</td> </tr> <tr> <td>
Italian</td> <td>39,230</td> <td>4.9%</td> </tr> <tr style="background: rgb(239, 239, 239) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous; color: black;"> <td>
Chinese</td> <td>34,435</td> <td>4.3%</td> </tr> <tr> <td>
Polish</td> <td>25,685</td> <td>3.2%</td> </tr> <tr style="background: rgb(239, 239, 239) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous; color: black;"> <td>
Dutch</td> <td>22,700</td> <td>2.8%</td> </tr> <tr> <td>
North American Indian</td> <td>21,600</td> <td>2.7%</td> </tr> <tr style="background: rgb(239, 239, 239) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous; color: black;"> <td>
East Indian</td> <td>20,525</td> <td>2.6%</td> </tr> <tr> <td>
Lebanese</td> <td>17,500</td> <td>2.1%</td> </tr> <tr style="background: rgb(239, 239, 239) none repeat scroll 0% 0%; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous; color: black;"> <td>
African</td> <td>16,000</td> <td>2.0%</td></tr></tbody></table>