A group is a number of persons or things that are located, gathered, or classed together.

Groups of people

* Cultural group, a group whose members share the same cultural identity * Ethnic group, a group whose members share the same ethnic identity * Religious group (disambiguation), a group whose members share the same religious identity * Social group, a group whose members share the same social identity * Tribal group, a group whose members share the same tribal identity * Organization, an entity that has a collective goal and is linked to an external environment * Peer group, an entity of three or more people with similar age, ability, experience, and interest

Social science

* In-group and out-group * Types of social groups, Primary, secondary, and reference groups * Social group * Collective, Collectives

Science and technology

Mathematics

* Group (mathematics), a set together with a binary operation satisfying certain algebraic conditions

Chemistry

* Functional group, a group of atoms which provide some property to a molecule * Group (periodic table), a column in the periodic table of chemical elements

Computing and the Internet

* Group (computing), a collection of users or other objects * Group (database) * Group (online social networking) * Usenet newsgroup * Google Groups * Yahoo! Groups * Facebook groups

Other uses in science and technology

* Group (stratigraphy), in geology, consisting of formations or rock strata * Cultivar group, in biology, a classification category in the ''International Code of Nomenclature for Cultivated Plants'' * Galaxy groups and clusters, in cosmology * Group (firearms), the grouping of shots from a firearm * Language group, a unit of classification within a Language family

Other uses

* Breed Groups (dog), the group or category to which breeds of dogs are assigned by kennel clubs * Group (auto racing), a category of car allowed to compete in auto racing * Army group * Militia groups * Rebel groups * Terrorist groups * Group (military unit), an air force formation * Corporate group, a group of affiliated companies * Group psychotherapy, sometimes colloquially known as "group" * Musical ensemble