R-A Residential-Agricultural District is intended as a district of single-family homes and for continuance of forestry and agricultural activities. Land shown as institutional properties on the Zoning Map is so shown for descriptive purposes only and is a part of the R-A District.

R-B Residential-Business District is intended as a residential district with limited business uses frequently associated with residential uses and subject to the issuance of a special permit.

VCB Village Center Business District is intended to provide areas within Village Centers of Groton that allow for a mix of uses including retail, commercial, office, services, and residential of appropriate and walkable scale which contribute to the village's sense of place.

NB Neighborhood Business is intended to provide for areas of mixed uses to serve as small centers providing goods and services within or near residential neighborhoods or as a transitional zone between business areas and residential neighborhoods.

GB General Business District is intended to provide for a range of retail uses and services and commercial activities in appropriate locations along arterial or primary roads.

I Industrial District is intended as a district for manufacturing, research and development, and similar large scale uses.

O Official Open-Space District is intended to include areas which have already been dedicated or used for public or semipublic uses.

P Public Use District is intended to regulate land in public use or land with public facilities.

TCOD - The Town Center Overlay District is intended to promote a socially and economically vibrant town center by enabling development, by special permit, of a mixture of civic, residential and commercial uses consistent with the Town's Comprehensive Plan and the Design Guidelines for the district.

MCMOD - MBTA Communities Multi-Family Overlay District is intended to provide for higher density residential development at locations in proximity to infrastructure, services, and nexuses of activity, amenities, and development.