Definition
A Member of Congress is a person duly elected or appointed to serve in either the United States Senate or the United States House of Representatives. Together, these two chambers constitute the United States Congress under Article I of the Constitution.
In strict constitutional and legal usage, the term encompasses both senators and representatives. A senator serves a six-year term, with the Senate composed of two members from each state. A representative serves a two-year term, with House membership apportioned among the states by population.
Common Language
Modern common usage (Wiktionary): An elected official serving in the U.S. Congress, either as a Senator or a Representative.
Historical common usage (Webster's 1913): Not separately defined; the term would have been understood colloquially as a representative in Congress generally.
In everyday speech, "Member of Congress" or "Congressman" often refers specifically to a member of the House of Representatives, not the Senate. Senators are typically called "Senator." In legal texts and statutes, however, the term is not so limited — it covers both chambers unless the instrument explicitly restricts its scope.
Common Confusion
The most significant recurring confusion is between the colloquial and legal meanings of the term. In popular usage, especially in political journalism and informal speech, "Member of Congress" or "Congressman/Congresswoman" is used almost exclusively to mean a House member. Senators are rarely called Members of Congress in ordinary conversation, even though they legally are. Researchers reading historical legal sources, statutes, and legislative records must be alert to context: a document using "Member of Congress" may intend both chambers, while the same phrase in a newspaper account from the same period may mean only House members.
Why It Matters in Research
The gap between popular and legal usage creates a genuine research trap. Statutes and regulations that impose obligations on, grant privileges to, or restrict "Members of Congress" typically mean both senators and representatives unless otherwise specified. The Ethics in Government Act, the Speech or Debate Clause jurisprudence, and federal conflict-of-interest statutes (such as 18 U.S.C. § 207) use the term in its full constitutional sense. Researchers who approach these materials with the colloquial understanding may misread the scope of the rule.
Historical sources compound the confusion. In 19th-century usage, the distinction between "Senator" and "Representative" was sharper in popular culture but less rigorously maintained in legal drafting. Early federal statutes sometimes specified "members of either house" to make bicameral coverage explicit — a sign that drafters were aware the shorthand was imprecise.
The Speech or Debate Clause (Article I, Section 6) is a critical area where precise identification matters. The clause protects "Senators and Representatives," and courts have spent considerable effort defining who counts as a "Member" for purposes of that immunity versus staffers or delegates. Researchers working on legislative privilege or congressional immunity questions should trace how courts define "Member" in that context, which is a narrower and more technical inquiry than the general statutory definition.
Delegates to Congress (such as those from Washington D.C., Puerto Rico, and other territories) present an additional complication. They serve in the House but with limited voting rights, and their status as "Members of Congress" for various statutory purposes has been addressed differently across different legal instruments. Do not assume uniformity.
Historical Dictionary Support
Both Black's Law Dictionary and Bouvier's Law Dictionary provide identical, minimal definitions: a member of the senate or house of representatives of the United States. Black's adds a telling editorial note — that in popular usage the term refers particularly to House members — which confirms that the gap between legal and colloquial meaning was recognized even by legal lexicographers of the era. Neither source elaborates on the constitutional basis, the distinction between voting and non-voting members, or the implications for specific legal contexts such as privilege or conflict-of-interest law. Researchers should treat these historical entries as confirming the bicameral scope of the term, but should not rely on them for nuance beyond that basic point.
Jurisdictional Note
This term is a federal constitutional designation and has no state-law equivalent. State legislators are not Members of Congress, though they may be members of their respective state legislatures. Statutes using "Member of Congress" in the federal code do not reach state legislators unless expressly extended by the drafting instrument.
Encyclopedia Cross-Reference
No directly relevant Law Mind Encyclopedia entry. Researchers exploring related structural questions may consult:
— LLCs — Member Rights, Voting, and Information Access (The Law Mind Business Organizations & Corporate Law Encyclopedia) [structural parallel for membership concepts in other legal contexts, not directly applicable]