| WATERLOO 0923277 | THE UNIVERSITY OF WATERLOO | All goods and services | Protected | 2015 |
| Waterloo Farm 0909378 | HER MAJESTY THE QUEEN IN RIGHT OF THE PROVINCE OF BRITISH COLUMBIA | All goods and services | Protected | 1997 |
| WATERLOO DARK 0727703 · TMA439465 | CARLSBERG CANADA INC. | 32 Beer | Registered | 1995 |
| WATERLOO UNITED 1564514 · TMA861668 · design | Waterloo Minor Soccer Club | 6 Metal14 Jewellery16 Paper+9 | Registered | 2013 |
| WATERLOO BREWING 1890100 · TMA1066898 · design | CARLSBERG CANADA INC. | 14 Jewellery25 Clothing32 Beer | Registered | 2019 |
| WATERLOO BARRIER 1444266 · TMA777417 | WATERLOO BARRIER INC. | 6 Metal | Registered | 2010 |
| WATERLOO WARRIORS 0910453 · design | THE UNIVERSITY OF WATERLOO | All goods and services | Protected | 1998 |
| WATERLOO WARRIORS 0910452 | THE UNIVERSITY OF WATERLOO | All goods and services | Protected | 1998 |
| WATERLOO INSURANCE 1377432 · TMA812561 | Definity Insurance Company | 36 Finance | Registered | 2011 |
| WATERLOO BIOFILTER 0874663 · TMA602740 | WATERLOO BIOFILTER SYSTEMS INC. | 1 Chemicals3 Cosmetics5 Pharmaceuticals | Registered | 2004 |
| WATERLOO BREWING CO. 1565507 · TMA889319 | CARLSBERG CANADA INC. | 32 Beer33 Wine | Registered | 2014 |
| MIN WATERLOO REGION 1423358 · TMA769927 · design | Igloo Inc. | 35 Advertising38 Telecommunications41 Education | Registered | 2010 |
| WATERLOO RESIDENCES 0923286 | UNIVERSITY OF WATERLOO | All goods and services | Protected | 2015 |
| INTELLIGENT WATERLOO 1358524 · TMA782855 · design | THE CORPORATION OF THE CITY OF WATERLOO | 16 Paper | Registered | 2010 |
| WATERLOO INSURANCE W 0799439 · TMA474903 · design | Definity Insurance Company | 36 Finance | Registered | 1997 |
| ALERT WATERLOO REGION 0926387 · design | THE REGIONAL MUNICIPALITY OF WATERLOO | All goods and services | Protected | 2022 |
| WATERLOO REGION MUSEUM 1523635 · TMA832320 · design | The Regional Municipality of Waterloo an Ontario municipal corporation as defined by the Municipal Act, S.O. 2001, c.25 | 16 Paper18 Leather21 Housewares+3 | Registered | 2012 |
| Waterloo Region Record 1406461 · TMA767105 | METROLAND MEDIA GROUP LTD. | 9 Electronics16 Paper41 Education | Registered | 2010 |
| WATERLOO EYE INSTITUTE 0926105 | UNIVERSITY OF WATERLOO | All goods and services | Protected | 2020 |
| UNIVERSITY OF WATERLOO 0910454 · design | THE UNIVERSITY OF WATERLOO | All goods and services | Protected | 1998 |
| UNIVERSITY OF WATERLOO 0904911 · design | THE UNIVERSITY OF WATERLOO | All goods and services | Protected | 1992 |
| UNIVERSITY OF WATERLOO 0900269 | UNIVERSITY OF WATERLOO | All goods and services | Protected | 1983 |
| LAPIERRE WATERLOO SMALL 1785485 · TMA975893 | LES ÉQUIPEMENTS LAPIERRE INC. | 7 Machines11 Lighting35 Advertising | Registered | 2017 |
| WATERLOO INNOVATION PARK 1286285 · TMA705935 | Colonia Treuhand Limited | 35 Advertising36 Finance37 Construction+1 | Registered | 2008 |
| WATERLOO SPARKLING WATER 2104273 · design | Waterloo Sparking Water Corp. | 32 Beer | Pending | 2021 |