| Organization Name(s) | Located In |
| Dalhousie Food Action Group Inc, Dalhousie Food Cupboard | Ottawa |
| Dalhousie Nonprofit Housing Co-operative | Ottawa |
| Dave Smith Youth Treatment Centre | Ottawa |
| David Smith Marionettes | Kingston |
| Davies Charitable Foundation (The) | Kingston |
| Dawn House Women's Shelter | Kingston |
| Daybreak Non-Profit Shelter (Ecumenical) Corporation | Ottawa |
| Deborah Boldt Counselling Services, Arnprior | Arnprior |
| Deborah Boldt Counselling Services, Pembroke | Pembroke |
| Debra Dynes Family House, Debra Dynes Emergency Food Bank | Ottawa |
| Debra Dynes Family House Inc. | Ottawa |
| Debtors Anonymous | Ottawa |
| Deep River and Area Family Enrichment Network, Family Resource Program, Ontario Early Years Satellite | Deep River |
| Deep River and Area Family Enrichment Network, Family Resource Program, Ontario Early Years Satellite, Chalk River | Chalk River |
| Deep River and Area Family Enrichment Network, Family Resource Program, Ontario Early Years Satellite, Point Alexander | Laurentian Hills |
| Deep River and District Hospital | Deep River |
| Deep River and District Hospital, Auxiliary | Deep River |
| Deep River and District Hospital, Deep River and District Physiotherapy Centre | Deep River |
| Deep River and District Hospital, Diagnostic Imaging | Deep River |
| Deep River and District Hospital, Foundation | Deep River |
| Deep River and District Prostate Cancer Support Group | Deep River |
| Deep River Nursery School and Childcare Centre | Deep River |
| Deep River Public Library | Deep River |
| Deep River Science Academy | Deep River |
| Deep River Skating Club | Deep River |
| Deep River. Emergency Services, Deep River Police | Deep River |
| Deep River. Municipal Office | Deep River |
| Deep River. Municipal Office, CAO / Clerk's Office | Deep River |
| Deep River. Municipal Office, Emergency Services, Police Service Board | Deep River |
| Deep River. Municipal Office, Public Works | Deep River |
| Deep River. Municipal Office, Recreation Department | Deep River |
| Deep River. Recreation Department, Deep River Community Pool | Deep River |
| Delta Community Pharmacy, Delta, King St | Delta |
| Delta Fair Board Hall | Delta |
| Delta Food Bank | Delta |
| Denbigh-Matawatchan-Schutt Pastoral Charge, St. Luke's United Church | Denbigh |
| Deseronto Helping Hands Food Bank | Deseronto |
| Deseronto Public Library | Deseronto |
| Deseronto Transit | Deseronto |
| Deseronto. City Hall | Deseronto |
| Deseronto. Fire Department | Deseronto |
| Deseronto. Parks and Recreation Department, Community Recreation Centre | Deseronto |
| Desert Stream Christian Fellowship | Belleville |
| Desjardins Pharmacy, The Ottawa Hospital / General Campus, Ottawa, Smyth Rd | Ottawa |
| Destiny's Way | Merrickville-Wolford |
| Developmental Services of Leeds and Grenville, Brockville Head Office | Brockville |
| Developmental Services of Leeds and Grenville, Gananoque Office | Gananoque |
| Developmental Services of Leeds and Grenville, Inclusive Child Care Program | Brockville |
| Developmental Services of Leeds and Grenville, Kemptville Satellite Office | Kemptville |
| Developmental Services of Leeds and Grenville, Prescott Satellite Office | Prescott |
| Developmental Services Ontario Eastern Region | Vanier |
| Dianne Johns Counselling Services | Belleville |
| Dietitians of Canada | Toronto |
| Dignity Canada Dignité | Toronto |
| Direction Ontario | Kapuskasing |
| Distinct Healthcare Services Inc | Brampton |
| Distress Centre Lanark, Leeds and Grenville, Head Office | Brockville |
| Distress Centre Lanark, Leeds and Grenville, Perth Area Office | Perth |
| Distress Centre of Lanark, Leeds and Grenville | Brockville |
| Distress Centre of Ottawa and Region | City of Ottawa |
| Dive Brockville Adventure Centre, Abucs scubA Charters | Brockville |
| Domestic Violence Sexual Assault Response Program | Belleville |
| Domino Theatre | Kingston |
| Double Check Home and Pet Sitting Services | Ottawa |
| Down Syndrome Association, National Capital Region | Ottawa |
| Downtown Business Association, Smiths Falls | Smiths Falls |
| Downtown Business Improvement Area, Downtown Brockville | Brockville |
| Downtown Gananoque Business Improvement Area | Gananoque |
| Downtown Heritage Perth Business Improvement Area | Perth |
| Downtown Kingston! Business Improvement Area | Kingston |
| Downtown Kingston! Business Improvement Area, Movies in the Square | Kingston |
| Dr David Kaufman | Cornwall |
| Dr James Naismith Museum | Almonte |
| Dr. Paul Dempsey, Quinte Pediatrics and Adolescent Medicine | Belleville |
| Drake International | Belleville |
| Dreams In Motion Performing and Fine Arts School | Gananoque |
| Dreams Take Flight, Ottawa Chapter | Ottawa |
| Dress for Success Ottawa | Ottawa |
| Drug Basics, Ottawa, Merivale Rd | Ottawa |
| Drug Smart Pharmacy, Sydenham | Sydenham |
| Drugstore Pharmacy, Almonte, Ottawa St | Almonte |
| Drugstore Pharmacy, Brockville, Parkedale Ave | Brockville |
| Drugstore Pharmacy, Carleton Place, McNeely Ave | Carleton Place |
| Drugstore Pharmacy, Cornwall, 9th St E | Cornwall |
| Drugstore Pharmacy, Embrun, Notre Dame St | Embrun |
| Drugstore Pharmacy, Gloucester, Place d'Orleans Dr | Orléans |
| Drugstore Pharmacy, Gloucester, River Rd | Gloucester |
| Drugstore Pharmacy, Hawkesbury, Cameron St | Hawkesbury |
| Drugstore Pharmacy, Kanata, Eagleson Rd | Kanata |
| Drugstore Pharmacy, Kemptville, Highway 43 | Kemptville |
| Drugstore Pharmacy, Kingston, Coverdale Dr | Kingston |
| Drugstore Pharmacy, Kingston, Princess St | Kingston |
| Drugstore Pharmacy, Napanee, Centre St N | Napanee |
| Drugstore Pharmacy, Nepean, Baseline Rd | Nepean |
| Drugstore Pharmacy, Nepean, Grant Carman Dr | Nepean |
| Drugstore Pharmacy, Nepean, Robertson Rd | Nepean |
| Drugstore Pharmacy, Nepean, Strandherd Dr | Nepean |
| Drugstore Pharmacy, Orléans, Orléans Blvd | Orléans |
| Drugstore Pharmacy, Ottawa, Alta Vista Dr | Ottawa |
| Drugstore Pharmacy, Ottawa, Bank St | Ottawa |
| Drugstore Pharmacy, Ottawa, Bank St | Ottawa |
| Drugstore Pharmacy, Ottawa, Earl Grey Dr | Kanata |
| Drugstore Pharmacy, Ottawa, Greenbank Rd | Ottawa |
| Drugstore Pharmacy, Ottawa, Innes Rd | Ottawa |
| Drugstore Pharmacy, Ottawa, Richmond Rd | Ottawa |
| Drugstore Pharmacy, Ottawa, Rideau St | Ottawa |
| Drugstore Pharmacy, Prescott, Prescott Centre Dr | Prescott |
| Drugstore Pharmacy, Rockland, Laurier St | Rockland |
| Drugstore Pharmacy, Smiths Falls, Ferrara Dr | Smiths Falls |
| Drugstore Pharmacy, Stittsville, Main St | Stittsville |
| Drugstore Pharmacy, Vanier, McArthur Ave | Vanier |
| Drummond North Elmsley Tay Valley Fire Rescue | Perth |
| Drummond/North Elmsley. Municipal Offices | Port Elmsley |
| Ducks Unlimited Canada, Kingston | Kingston |
| Duke of Edinburgh's Award (The), Ontario Office | Toronto |
| Dundas County Food Bank | Winchester |
| Dundas County Food Bank, Morrisburg | Morrisburg |
| Dundas County Hospice | Williamsburg |
| Dundas Manor Nursing Home | Winchester |
| Dying with Dignity Canada | Toronto |
| Dystonia Medical Research Foundation Canada | Toronto (City of) |