MDplates.com
MDplates is a joint venture between Jordan Irazabal of Delaware, and Scott Zillmer of Maryland. The goal is to find and photograph every special organization plate that Maryland offers.
Letter: H
| Type | High | Full Name |
| HA | 0070 | Havre De Grace Ambulance Corps, Inc. |
| HATS | 035 | Hats Off to Breast Cancer Foundation |
| HBA | Building Industries Foundation | |
| HBA | Home Builders Association of Maryland | |
| HC | 00313 | Hood College Alumnae |
| HCF | 0145 | Howard County Professional Firefighters Local 2000 |
| HCF | Howard County Professional Firefighters Local 2000 (motorcycle) | |
| HCH | Harford, Cecil County, Maryland of the Harley Owners Group | |
| HCP | 0100 | Howard County Police Officers Association, Inc. |
| HD | 0286 | Baltimore Metro Chapter of the Harley Owners Group, Inc. |
| HD | 0171 | Baltimore Metro Chapter of the Harley Owners Group, Inc. (motorcycle) |
| HDG | 0072 | City of Havre De Grace |
| HDV | 2318 | Honorably Discharged Veteran |
| HDV | Honorably Discharged Veteran (motorcycle) | |
| HDW | Williamsport MD Chapter Harley Owners Group | |
| HDW | Williamsport MD Chapter Harley Owners Group (motorcycle) | |
| HE | Hereford Volunteer Fire Company | |
| HFC | Volunteer Fire Company of Halfway, Inc. | |
| HFD | Hebron Volunteer Fire Department | |
| HG | 0067 | Montgomery County, Maryland Chapter of Harley Owners Group |
| HG | Montgomery County, Maryland Chapter of Harley Owners Group (motorcycle) | |
| HGF | 0104 | Hiram Grand Lodge |
| HH | Herald Harbor Volunteer Fire Department, Inc. | |
| HI | Hoopers Island Volunteer Fire Company | |
| HIQ | 0152 | Mensa |
| HKY | USA Hockey | |
| HL | 0002 | Humane Society of Harford County |
| HM | 0036 | Howard County Professional Fire Officers |
| HO | 0128 | All American Chapter Harley Owners Group |
| HO | All American Chapter Harley Owners Group (motorcycle) | |
| HOF | 1691 | Cal Ripken Sr. Foundation |
| HOI | Friendship House (House of Iran) | |
| HPC | Hawks Pleasure Club | |
| HPD | 0040 | Port Deposit Heritage Corporation, Inc. |
| HPF | Hagerstown Local 1605 | |
| HQ | 0001 | Princess Anne Vol Fire Co |
| HR | Norrisville Volunteer Fire Company | |
| HRS | Hollywood Volunteer Rescue Squad | |
| HS | Hillside Volunteer Fire Department, Inc. | |
| HSB | Baltimore Humane Society | |
| HSM | Historic St. Mary's City Foundation, Inc. | |
| HST | 0094 | Hubble Space Telescope |
| HU | 0190 | Hampton University Alumni Association |
| HUA | 0058 | Howard University Alumni Chapter of Prince George's County |
| HV | Hughesville Volunteer Fire Department and Rescue Squad, Inc. | |
| HVC | 0063 | Hurlock Volunteer Fire Company |
| HVF | 0164 | Hollywood Volunteer Fire Department, Inc. |
| HWK | University of Maryland Eastern Shore Alumni Association, Inc. |
