| Organization / Program Name(s) | Located In |
| IAVGO Community Legal Clinic | Toronto West |
| iCare Discount Pharmacy | Toronto East |
| ICC Healthnet, Pickering Centre | Pickering (City of) |
| Iced Energy Synchronized Skating, Newmarket - Magna Centre, Mulock Drive | Newmarket |
| IDA Drug Mart, North York - 1333 Sheppard Ave E, Pharmacy Services | North York East |
| IDA Drug Store, Community Pharmacy Whitby | Whitby (Town of) |
| IDA Drug Store, Beaverton | Beaverton |
| IDA Pharmacy, Toronto - 1938 Bloor St W (High Park Pharmacy), Pharmacy Services | Toronto West |
| IDA Pharmacy, Toronto - 572 Parliament St (Dale's), Pharmacy Services | Toronto Central |
| IDA Pharmacy, Toronto - 1176 Queen St E (Leslie Grove), Pharmacy Services | Toronto East |
| IDA Pharmacy, Toronto - 1460 Queen St W (Vina), Pharmacy Services | Toronto West |
| IDA Pharmacy, North York - 5631 Yonge St, Pharmacy Services | North York Central |
| IDA Pharmacy, North York - 1280 Finch Ave W (Nor-Arm), Pharmacy Services | North York West |
| IDA Pharmacy, Willowdale - 1065 Steeles Ave W (Concourse Pharmacy), Pharmacy Services | North York West |
| IDA Pharmacy, Willowdale - 3885 Don Mills Rd (Cliffwood Pharmacy), Pharmacy Services | North York East |
| IDA Pharmacy, Toronto - 2754 Victoria Park Ave, Pharmacy Services | North York East |
| IDA Pharmacy, Etobicoke - La Rose Ave, Pharmacy Services | Etobicoke Central |
| IDA Pharmacy, North York - Sheppard Ave W (New Canyon), Pharmacy Services | North York West |
| IDA Pharmacy, North York - York Gate Blvd (Yorkgate), Pharmacy Services | North York West |
| IDA Pharmacy, North York - 2035 Sheppard Ave E (Legacy Pharmacy), Pharmacy Services | North York West |
| IDA Pharmacy, Etobicoke - 2408 Lake Shore Blvd W (Mimico) | Etobicoke South |
| IDA Pharmacy, Etobicoke - 2891 Lake Shore Blvd W (Don Russell Drug Mart), Pharmacy Services | Etobicoke South |
| IDA Pharmacy, Etobicoke - 3271 Bloor St W | Etobicoke Central |
| IDA Pharmacy, Scarborough - 1089 Kingston Rd (Henley Gardens) | Scarborough South |
| IDA Pharmacy, East York - 2 Thorncliffe Park Dr (iCare) | East York |
| IDA Pharmacy, Toronto - 40 Wellesley St E (White Cross Drugs), Pharmacy Services | Toronto Central |
| IDA Pharmacy, Toronto - 90 Eglinton Ave E (Apex Compounding), Pharmacy Services | Toronto North |
| IDA Pharmacy, Toronto - 280 Spadina Ave (Hui's), Pharmacy Services | Toronto North |
| IDA Pharmacy, Toronto - 411 Jane St (Lingeman), Pharmacy Services | Toronto West |
| IDA Pharmacy, Toronto - Rogers Rd | City of York |
| IDA Pharmacy, Toronto - 725 Jane St (White's), Pharmacy Services | Toronto West |
| IDA Pharmacy, Toronto - 790 Bay St (Bay College), Pharmacy Services | Toronto Central |
| IDA Pharmacy, Toronto - 795 Broadview Ave (Procare), Pharmacy Services | Toronto East |
| IDA Pharmacy, Toronto - 800 Bathurst St (Bathurst and Bloor Drug Mart), Pharmacy Services | Toronto West |
| IDA Pharmacy, Toronto - 1118 Victoria Park Ave (Glen George), Pharmacy Services | East York |
| IDA Pharmacy, Toronto - 1190 Queen St W (Cure), Pharmacy Services | Toronto West |
| IDA Pharmacy, Toronto - 1732 St Clair Ave W (Whiteside), Pharmacy Services | Toronto West |
| IDA Pharmacy, Toronto - 1871 Danforth Ave (Danforth Drugmart), Pharmacy Services | Toronto East |
| IDA Pharmacy, Toronto - 1901 Yonge St (Sam's), Pharmacy Services | Toronto North |
| IDA Pharmacy, Toronto - 1801 Eglinton Ave W (Ayda Pharmacy), Pharmacy Services | City of York |
| IDA Pharmacy, Scarborough - Antrim Cres (Kennedy Rd Pharmacy) | Scarborough Central |
| IDA Pharmacy, Scarborough - Markham Rd (Mornelle Drug Mart) | Scarborough Central |
| IDA Pharmacy, Scarborough - Ellesmere Rd (Morrish Pharmacy), Pharmacy Services | Scarborough South |
| IDA Pharmacy, Scarborough - Dean Park Rd (Pan Drugs), Pharmacy Services | Scarborough North |
| IDA Pharmacy, Scarborough - Morningside Ave (Super Value Pharmacy) | Scarborough South |
| IDA Pharmacy, Scarborough - 3155 Eglinton Ave E (Total-Care Pharmacy) | Scarborough South |
| IDA Pharmacy, Scarborough - Brimley Rd (BRMC Pharmacy), Pharmacy Services | Scarborough North |
| IDA Pharmacy, Scarborough - Kingston Rd (Boniface Park Pharmacy) | Scarborough South |
| IDA Pharmacy, Scarborough - Midland Ave (Evergold Pharmacy) | Scarborough North |
| IDA Pharmacy, Scarborough - Guildwood Pkwy (Guildwood Drug Mart) | Scarborough South |
| IDA Pharmacy, Scarborough - Antrim Cres | Scarborough Central |
| IDA Pharmacy, Scarborough - Chelwood Rd (Dale's Pharmacy) | Scarborough Central |
| IDA Pharmacy - Toronto - 275 Dundas St W (Pharmacy by the Grange) | Toronto Central |
| IEM Basketball League, Newmarket - various schools in York Region and surrounding area, Organized basketball league | Newmarket |
| Ikebata Nursery School | North York East |
| Imagine Canada | Toronto Central |
| IMAGINE: Students Promoting Health | Toronto West |
| Immigrant Women's Health Centre | Toronto West |
| Immigration and Refugee Board of Canada, Central Region | Toronto Central |
| Immigration and Refugee Board of Canada, Immigration Holding Centre | Etobicoke North |
| Immaculate, Day Care | Toronto West |
| Immaculate Conception Church, Roman Catholic | Sutton |
| Immaculate Conception Parish | Woodbridge |
| Immanuel Christian School | Oshawa (City of) |
| Immanuel Day Care Centre | Scarborough North |
| Immigration and Refugee Board of Canada | Toronto |
| Imperial Order of the Daughters of the Empire | Uxbridge (Township of) |
| In Search of Justice, Woodbridge, Highway 7, Advocacy and representation for men in divorce, custody and access of children | Woodbridge |
| In Your Home Dog Grooming | Oshawa (City of) |
| INAS Canada, Toronto | North York West |
| Income Security Advocacy Centre | Toronto Central |
| Independent Learning Centre | Toronto North |
| Indspire | Toronto Central |
| Infertility Network | Toronto |
| Information and Privacy Commissioner | Toronto North |
| Injured Workers Consultants | Toronto East |
| Inner City Angels | Toronto East |
| Institute of Leadership for Women in Ontario | North York Central |
| Insurance Bureau of Canada, Ontario Region | Toronto Central |
| Insurance Institute of Canada | Toronto Central |
| Integra | Toronto North |
| International Association for Medical Assistance to Travellers | Toronto West |
| International Council of AIDS Service Organizations | Toronto Central |
| Interval House | Toronto |
| Interval House, Building Economic Self Sufficiency | Toronto |
| Investor Education Fund | Toronto Central |
| Ina Grafton Gage Home - Long Term Care Home | Scarborough |
| Income Security Advocacy Centre | Toronto |
| Independent Order of Oddfellows, Beethoven Lodge #165 | Brooklin |
| Independent Order of Oddfellows, Oddfellows Hall Rental, Beethoven Lodge #165 | Whitby (Town of) |
| Infertility Network | Toronto |
| Infinite Care | Toronto Central |
| Infinity Health Care | Toronto Central |
| Infinity Health Pharmacy | Toronto Central |
| Information and Communications Technology Council, Markham, Lisgar Street, Integrated Work Experience Strategy Program | Markham |
| Information Durham | Ajax (Town of) |
| Information Markham, Markham Civic Centre, Town Centre Blvd, Community Information and Volunteer Centre | Markham |
| Inn From the Cold, Newmarket, Penrose Street, Homeless Shelter | Newmarket |
| Inn From the Cold, Newmarket, Penrose Street, Eat Inn Catering, Catering Employment Program | Newmarket |
| Institute Of Child Study After School Daycare | Toronto North |
| Insurance Brokers of Durham Region Association | Ajax (Town of) |
| Integracare | Toronto North |
| Integrated Rehab Professionals | Pickering (City of) |
| Inter Action Rehabilitation Inc. | North York East |
| International Association of Fire Fighters, Local 465 Oshawa | Oshawa (City of) |
| International Pharmacy, Toronto, Pharmacy Services | Toronto West |
| International Schizophrenia Foundation | North York Central |
| IODE Holland Landing, Newmarket & Holland Landing - Meetings held in members' homes, A national women's charitable organization | Newmarket |
| IODE Oshawa, Golden Jubilee Chapter | Oshawa (City of) |
| Iranian Community Association of Ontario | City of York |
| Iranian Railroad for Queer Refugees | Toronto (City of) |
| Iranian Women's Organization of Ontario | North York East |
| Irish Canadian Immigration Centre | Toronto Central |
| Iranian-Canadian Youth Support Group, Toronto, Yonge Street, Resettlement and integration support for Farsi speaking youth | York Region |
| Iris Consulting for Seniors | North York East |
| Iroquois Park Sports Centre, Adult Hockey Leagues | Whitby (Town of) |
| Islamic Social Services and Resources Association | Toronto West |
| Islington Medical Centre and Travel Clinic | Etobicoke Central |
| Islington Centre -- Etobicoke Senior Citizens | Etobicoke Central |
| Isabella Walton Child Care | Scarborough Central |
| Islamic Centre of Vali-Asr, Markham, Birchmount Road, Education and religious centre for Iranian Canadians | Markham |
| Island Taxi | Port Perry |
| Islington Medical Pharmacy | Etobicoke Central |
| Islington Village Childcare Academy Inc. | Etobicoke South |
| ISTHATLEGAL.CA | Toronto |
| Italian Cultural Institute, Woodbridge, Highway 7 West, Italian Language and Culture Learning Centre | Woodbridge |
| Italian Recreation Club | Oshawa (City of) |
| Italian Recreation Club, Hall Rental Information | Oshawa (City of) |
| Italian Social Group, Newmarket - St. John Chrysostom Parish Hall, Ontario Street, A program for Italian speaking parishioners and friends | Newmarket |
| It's Playtime Childcare Centre | Toronto East |
| Ivan Franko Home | Etobicoke South |
| Ivy Hockey Academy, York Region - various locations, Hockey School and Camps | Thornhill East |
