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Interest Groups

Types of Interest Groups


Strategies Used by Interest Groups

An interest group is an organization of people who share a common interest and work together to protect and promote that interest by influencing the government. Interest groups vary greatly in size, aims, and tactics. Political scientists generally divide interest groups into two categories: economic and noneconomic.

Economic Groups

Economic groups, which seek some sort of economic advantage for their members, are the most common type of interest group. Money has significant influence in capitalist societies, so economic interest groups are numerous and powerful. These groups are usually well funded because members willingly contribute money in the hopes of reaping greater political influence and profit.

Economic groups work to win private goods, which are benefits that only the members of the group will enjoy. When a labor union agrees to a contract, for example, its members benefit from the contract, whereas nonunion members do not. If there is no private good incentive, people might choose not to join (especially if there is a membership fee or dues). There are four main types of economic groups: business groups, labor groups, agricultural groups, and professional associations.

Business Groups

Business groups are the most common type of interest group; more than half of all registered lobbyists work for business organizations. Some business lobbyists work for a single corporation, lobbying solely for that company. Businesses also form associations with companies from the same industry to promote all of their interests. For example, the American Petroleum Institute works on behalf of oil companies. Some groups act on behalf of business in general. The U.S. Chamber of Commerce, for example, seeks pro-business policies in general, not just policies that help one part of the economy.

Because they are usually well funded, business groups tend to be very influential. They work to promote the interests of private companies and corporations by seeking tax cuts, regulatory changes, and other pro-business benefits. Business groups do not always agree with one another, however. What benefits one industry may harm another, so advocates for those industries quite often work against one another.

Labor Groups

Labor groups represent unions, which work to increase wages and improve working conditions for both skilled and unskilled workers. Individual workers have very little power, but banded together, they can wield significant influence. Labor unions have been a significant part of American economic and political life since the late nineteenth century. At the peak of the unions’ influence, roughly one-third of American workers belonged to labor unions.

In recent decades, however, union membership has declined so that fewer than one-fourth of the nation’s workers belong to any union. The American Federation of State, County, and Municipal Employees; the United Food and Commercial Workers International; and Service Employees International are among the largest and most influential labor unions. The AFL-CIO (American Federation of Labor–Congress of Industrial Organizations) is an umbrella organization of labor unions that cooperate in order to expand their influence. Labor unions spend much of their time and energy dealing with employers, but they also play a political role. Unions mobilize voters and donate money to help candidates who they feel will benefit workers.

Agricultural Groups

Agricultural groups represent the interests of farmers. Farmers have been organized for centuries to protect themselves against price fluctuations and other issues. In the United States, farmers’ groups, such as the Grange movement, have played an important role in politics, which continues today: The federal government spends large amounts of money supporting farmers and influencing what crops are grown. Not all agricultural groups agree on the same policies. Some groups, such as the Farm Bureau, tend to work most closely with large agribusinesses, whereas others, such as the Farmers Union and the Grange, do more to protect family farms.

Professional Associations

Many professionals have formal organizations that set ground rules for the profession, regulate practices, and promote standards of conduct. Professional associations also lobby the government on issues related to their profession. The American Medical Association, for example, fights against laws it feels undercut physicians’ autonomy. Similarly, the National Education Association, a professional association for teachers, lobbies for policies it feels will benefit teachers and students.

Noneconomic Groups

Noneconomic groups (sometimes called citizens’ groups) are interest groups that fight for causes instead of working for material gain. Unlike economic groups, which work for private goods, noneconomic groups seek public goods (also called collective goods), which benefit everyone in society, not just members of the group. Instead of material incentives, these groups offer their members a variety of selective incentives, including the following benefits:

  • Purposive benefits: The emotional and psychological benefits members receive knowing they have contributed to a cause they feel is worthwhile
  • Solidarity benefits: The social benefits members receive after meeting new people and friends they worked with to promote the cause
  • Informational benefits: The educational benefits members receive after having learned more about the issues that matter to them

There are four main types of noneconomic groups: public interest groups, single-issue groups, ideological groups, and government groups.

Public Interest Groups

Public interest groups claim to work for the good of the whole society, not just one part of it. Not surprisingly, public interest groups often have very different ideas as to how to improve society. Many public interest groups tackle a number of related issues. Greenpeace, for example, works to protect ecosystems around the world and to educate the public about dangers to the environment. The nonpartisan public interest group Democracy 21 seeks to strengthen democracy by lobbying for election and campaign finance reforms.

Single-Issue Groups

Single-issue groups work solely on one specific issue. These groups tend to be very strongly driven, composed of members who are passionately committed to the particular cause. Over the last few decades, the number of single-issue groups has grown greatly; there are now groups covering a broad range of issues. Well-known single-issue groups include the National Rifle Association, which lobbies against gun control legislation, and Operation Rescue, which works to ban abortion.

Ideological Groups

Whereas single-issue groups have a very narrow focus, ideological groups have much broader aims rooted in a strongly held philosophy. Ideological groups often work to change cultural norms, values, and prevailing stereotypes. Conservative ideological groups include the Christian Coalition and the Traditional Values Coalition, whereas liberal ideological groups include the NOW and the National Organization for the Advancement of Colored People.

Government Groups

Government groups represent the interests of other governments. Many cities and state governments, for example, have lobbyists in Washington to act in their interest. Most foreign governments also hire lobbyists to promote their interests in Congress and the White House.


Type of Group


Business National Association of Manufacturers


Labor International Brotherhood of Teamsters
Agricultural American Farm Bureau Federation
Professional Association American Bar Association
Public Interest League of Women Voters


Single Issue The Environmental Defense Fund
Ideological Christian Coalition
Government National League of Cities

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