Different Types of Groups in Organizations

Walk into any office, and you’ll notice something interesting: people don’t just work – they cluster. The marketing team huddles for a standup, two colleagues from different departments meet for chai every afternoon, a union quietly forms to push back against a new policy. Each of these is a group, but none of them are the same kind of group. Understanding these differences isn’t just academic hair-splitting; it’s central to how organisations actually function, decide, and occasionally stumble.

Why classifying groups matters 🔗

A group, in the simplest sense, is two or more people who interact, influence each other, and come together for a shared purpose. But groups vary enormously in their size, emotional depth, permanence, and purpose. Sociologists and organisational theorists have long argued that you can’t manage what you can’t name – and classifying groups helps managers, HR professionals, and civil servants understand where loyalty lives, where conflict brews, and where real decisions get made. As OpenStax’s Organizational Behavior textbook notes, groups can be understood through perception, structure, motivation, or interpersonal interaction – and each lens reveals something different.

Broadly, groups in organisations fall into a few overlapping categories: primary and secondary, social groups and coalitions, membership and reference groups, in-groups and out-groups, and the classic divide between formal and informal. Let’s walk through each.

Primary and secondary groups 🔗

The distinction between primary and secondary groups was introduced by American sociologist Charles Horton Cooley in his 1909 work Social Organization. It remains one of the most useful ways of thinking about human association.

Primary groups 🔗

A primary group is small, intimate, and emotionally significant. Think of your family, your closest friends, or a tight-knit team that has worked together for years. According to Cooley, primary groups are characterised by close, personal, enduring relationships where members exchange implicit things like love, care, and support – and the relationship itself is the goal. These groups are psychologically comforting and play an outsized role in shaping personal identity.

In a workplace, a primary group might emerge among colleagues who have shared years of projects, successes, and setbacks. They know each other’s families, they cover for each other during emergencies, and they provide a kind of emotional anchoring that no HR policy can manufacture.

Secondary groups 🔗

Secondary groups are a different beast entirely. They are often larger and impersonal, task-focused, and time-limited – serving an instrumental function rather than an expressive one. Your entire department, a professional association, or the students in a large lecture hall are all secondary groups. The relationships are functional: you interact because the work demands it, not because your soul requires it.

Interestingly, the line between the two isn’t rigid. A group of coworkers might start out as a secondary group, but over years of shared lunches, late nights, and personal confidences, it can slowly transform into something resembling a primary group.

Social groups and coalitions 🔗

Social groups 🔗

Social groups form around shared identity, interest, or activity. In an organisation, these might be the cricket team that plays on weekends, the book club that meets after work, or the alumni network from a particular college. They exist largely to satisfy social needs – belonging, recognition, and camaraderie – rather than to accomplish organisational objectives.

Coalitions 🔗

Coalitions are a fascinating and often underestimated category. Unlike friendship-based social groups, coalitions are issue-oriented and purposeful. A coalition in organisational behaviour occurs when members of a group organise to support their side of a particular issue, existing to preserve or enhance self-interests and achieve a favourable balance of power.

What makes coalitions distinctive? They tend to share a common set of features: members act as a group, they form for a specific purpose, they operate independently of the formal organisational structure, they have no formal structure of their own, and they maintain an external focus on a specific issue. Importantly, coalitions are often temporary – they form quickly around a pressing issue, expand to gather support, peak at the moment of decision, and then dissolve.

For example, when a ministry proposes restructuring a public-sector undertaking, you might see employees from finance, operations, and HR – people who rarely interact otherwise – band together to push back against the proposed change. Once the decision is made (in either direction), the coalition dissolves. In politics, coalition governments work on a similar logic, except with higher stakes and longer timelines.

Membership groups and reference groups 🔗

Here’s where things get psychologically interesting. A membership group is one you actually belong to – your office, your professional body, your apartment association. Your participation is real and documented.

A reference group, on the other hand, is the group you measure yourself against. It may or may not be a group you belong to. A reference group is an important group to which individuals belong or hope to belong and with whose norms individuals are likely to conform. A junior IAS officer might treat senior bureaucrats as a reference group, adopting their speech patterns, dress codes, and decision-making habits long before formally joining their ranks.

Reference groups matter because they shape behaviour even in their absence. As sociologists Thompson and Hickey put it, reference groups are those that people refer to when evaluating their own qualities, circumstances, attitudes, values and behaviours. A reference group doesn’t even need to be real or present – a person might model themselves after an imagined community of “successful entrepreneurs” they’ve never met.

In-groups and out-groups 🔗

The concepts of in-group and out-group were developed by sociologist William Sumner in 1906 to explain how people distinguish between the groups they feel part of and those they feel excluded from.

An in-group is the group you identify with – your team, your department, your caste association, your alma mater. An out-group is, by definition, everyone else. This dynamic is everywhere in organisational life. Think of the invisible but powerful boundary between “old guard” employees and new hires, or between the executive floor and the shop floor. In-group favouritism often explains why certain decisions seem inexplicably generous to some and inexplicably harsh to others.

It’s worth noting that in-group/out-group dynamics aren’t always negative. A strong sense of “us” can drive team cohesion, productivity, and morale. But the same mechanism can produce ethnocentrism, workplace cliques, and bullying when taken to extremes.

Formal and informal groups 🔗

This is perhaps the most important distinction for public administration students, because it underpins how bureaucracies actually function versus how they appear on paper.

Formal groups 🔗

Formal groups are created deliberately by the organisation. They are work units prescribed by the organisation – sections of departments, committees, or special project task forces – set up by management on a temporary or permanent basis to accomplish prescribed tasks. They appear on the org chart, they have defined roles, and they follow rules.

Formal groups typically come in three main varieties:

Command groups: These are defined by the organisational hierarchy. A command group is a formal group determined by the organisation’s hierarchical chart and composed of the individuals who report to a particular manager. The District Collector and the officers reporting directly to them form a command group.

Task groups: These are assembled to complete a specific task, often cutting across departments. A task group might include people from multiple reporting lines. For example, when a new employee is onboarded, the task group might include the employee’s manager, an IT person handling equipment, an HR executive handling paperwork, and a training coordinator – none of whom report to each other.

Functional groups: Functional groups are permanent units created to perform an ongoing organisational function – like the finance department, the legal cell, or the public grievance wing. They continue to exist regardless of who the individual members are.

Committees, too, fall under formal groups. Committees are groups of people appointed by an organisation to resolve matters referred to them – advisory committees, standing committees, and so on.

Informal groups 🔗

Informal groups are where the real story often unfolds. An informal group is one that’s not organisationally determined or influenced, usually formed by members themselves in response to the need for social contact. They emerge naturally, without management’s blessing, around shared interests, values, or simple proximity.

Informal groups can take several forms. Friendship groups coalesce around shared interests, backgrounds, or personalities – the colleagues who go for chai together every evening. Interest groups form around a specific cause – employees pushing for better cafeteria food, or a subset of workers advocating for work-from-home flexibility. Cliques are smaller, more exclusive clusters that can sometimes create divisions within a workplace.

Here’s why informal groups matter so much: they often wield influence far beyond what the formal structure suggests. Informal groups are important because they exist outside the formal hierarchy but form the structure of personal and social interactions that managers are wise to respect and understand – employees motivate one another, informally train one another, and support one another during stress. A manager who ignores informal networks is essentially governing blind.

Informal groups also develop their own norms, roles, and unwritten rules. When those norms align with organisational goals, productivity soars. When they don’t, you get quiet resistance, rumour mills, and collective action that can stop an organisation in its tracks.

How these groups interact 🔗

Real organisations are messy, and the same person usually belongs to many groups at once. A bureaucrat might simultaneously be part of a command group (their ministry), a task group (an inter-ministerial committee), a friendship group (batchmates from the academy), a reference group (retired senior officers whose style they emulate), and a coalition (colleagues quietly lobbying for a policy change). Each membership shapes behaviour differently.

The interplay between formal and informal groups is particularly consequential. Both establish norms, roles, and goals, and both demand loyalty from their members – when an individual belongs to many groups, conflicting situations emerge that impact organisational behaviour. Civil services officers often feel these tensions acutely, balancing formal duty with informal obligations to peers, mentors, and communities.

Why this matters for public administration 🔗

In public administration, understanding group types isn’t just about passing an exam. Government organisations are unusually dense with overlapping groups. Formal hierarchies are steep, but informal networks – old-school ties, cadre loyalties, and caste or linguistic affinities – often shape real outcomes. Coalitions form around policy fights. Reference groups influence young officers’ ambitions. In-groups and out-groups can calcify into silos that paralyse implementation.

A thoughtful administrator learns to read all these groups at once – respecting the formal structure, acknowledging informal networks, anticipating coalitions, and understanding which reference groups are shaping whose behaviour. That’s not manipulation; it’s basic organisational literacy.

What do you think? Which informal group in your workplace or institution do you think has the greatest unacknowledged influence on decisions? And have you ever belonged to a coalition – even a short-lived one – that genuinely changed how things were done?

References

1. https://openstax.org/books/organizational-behavior/pages/9-1-work-groups-basic-considerations
2. https://www.britannica.com/topic/primary-group
3. https://en.wikipedia.org/wiki/Types_of_social_groups
4. https://openstax.org/books/introduction-sociology-3e/pages/6-1-types-of-groups
5. https://www.referenceforbusiness.com/management/Bun-Comp/Coalition-Building.html
6. https://courses.lumenlearning.com/wm-organizationalbehavior/chapter/group-structure/
7. https://courses.lumenlearning.com/wm-organizationalbehavior/chapter/types-of-groups/
8. https://keydifferences.com/difference-between-formal-and-informal-groups.html