- Jefferson Heath
- Jeffries
- Jeffries & Co.
- Jeffries Financial Group
- Jennings Center for Older Adults
- Jet Health
- Jewish Social Service Agency
- John A. Hartford Foundation
- John Hopkins University
- Johns Hopkins Bayview Medical Center
- Johns Hopkins Kimmel Cancer Center
- Johns Hopkins Medical
- Johns Hopkins Medicine
- Johns Hopkins University
- Joliet Area Community Hospice
- Joliet Community Hospice
- Jolly Good Inc.
- Joshua's House
- Journal of American Medical Association Network
- Journal of Clinical Oncology