| Rural Residential RF |
| Residential District AA |
| Residential District A |
| Residential District G |
| Village Residential VR |
| Transitional Residential RT |
| Westend Residential District WR |
| Limited Business LB |
| Village Commercial VC |
| Village Commercial-Willard VCW |
| Spring Point SP |
| Suburban Commercial CS |
| General Commercial CG |
| Professional Office PO |
| Transitional Central and Regional Commercial District CCRT |
| Central and Regional Commercial District CCR |
| Commercial C |
| Main Street Community Commercial MSCC |
| Village Extension VE |
| Broadway Corridor BC |
| Mill Creek Core MCC |
|
| Westend Neighborhood Center WNC |
| Western Avenue Commercial Corridor WACC |
| Meetinghouse Hill Community Commercial MHCC |
| Industrial I |
| Light Industrial IL |
| Non-Residential Industrial INR |
| Shipyard S |
| Conditional Residential District A-1 |
| Conditional Residential District G-1 |
| Conditional Residential District G-2 |
| Conditional Residential District G-3 |
| Conditional Residential District G-4 |
| Conditional Residential and Limited Commercial Use District G-5 |
| Conditional Residential District G-6 |
| Conditional Residential District G-7 |
| Conditional Shipyard S-1 |
| O'Neil Street Park Contract Zone District |
| Conditional School District 1 SCH-1 |
| Conditional Armory Zone District CAZ |
| Conditional Non-Residential Industrial Ecomaine Disposal Facility District 1 |
| Conditional Non-Residential Industrial Municipal Solid Waste Transfer District INR-MSW-1 |
| Open Space OS |
| Parks P |