List of members of the United States House of Representatives in the 66th Congress by seniority

This is a complete list of members of the United States House of Representatives during the 66th United States Congress listed by seniority. For the most part, representatives are ranked by the beginning of their terms in office.

As an historical article, the districts and party affiliations listed reflect those during the 66th Congress (March 4, 1919 – March 3, 1921). Seats and party affiliations on similar lists for other Congresses will be different for certain members.

This article describes the criteria for seniority in the House of Representatives and sets out the list of members by seniority. It is prepared on the basis of the interpretation of seniority applied to the House of Representatives in the current congress. In the absence of information to the contrary, it is presumed that the twenty-first-century practice is identical to the seniority customs used during the 66th Congress.

House seniority
Seniority in the House, for Congressmen with unbroken service, depends on the date on which the members first term began. That date is either the start of the Congress (4 March in odd numbered years, for the era up to and including the 73rd Congress starting in 1933) or the date of a special election during the Congress. Since many members start serving on the same day as others, ranking between them is based on alphabetical order by the last name of the congressman. If there is still a tie, then the first names are used.

Representatives who return to the House, after having previously served, are credited with service equal to one less than the total number of terms they served. When a representative has served a prior term of less than two terms (i.e., prior term minus one equals less than one), the member is ranked above all others whose service begins on the same day.

Committee seniority
At the start of the 66th Congress in 1919, the committee assignments were made by each party and then formally approved by the whole House. Each party controlled the committee ranking of its members, but usually this followed the order of seniority of members in terms of service on the committee. It was customary for members of a committee, in the previous congress, to be re-appointed at the start of the next.

A seniority rule was normally used to decide committee chairmen. The chairman was likely to be the majority member of a committee, with the longest continuous service on it. However, party leadership was typically not associated with seniority.

Out of a group of fifty seven standing committee chairmen, at the start of this Congress, Nelson Polsby identified thirty five as the most senior member of the majority on the committee. In nineteen other cases, senior majority members were compensated for not being chairman of the committee (ten chaired another committee, eight received better committee assignments than in the previous Congress and one joined the leadership). In three instances there was no obvious compensation for the apparent violation of the seniority custom.

Committees
This list refers to the standing committees of the House in the 66th Congress, the year of establishment as a standing committee (adoption of the name used in 1919), the number of members assigned to the committee and the corresponding committee in the current congress. Because of consolidation of committees and changes of jurisdiction, it is not always possible to identify a clear successor panel.

List of representatives by seniority
A numerical rank is assigned to each of the 435 members initially elected to the 66th Congress. Other members, who joined the House during the Congress, are not assigned a number. Two representatives-elect died and one resigned before the Congress started. Two died and two resigned after the legal start of the term but before Congress convened. In addition the House did not permit Victor L. Berger (Soc-WI) to take the seat to which he was elected. The list below includes those representatives-elect (with names in italics), with the seniority they would have held if they had been able to be sworn in.

Major party designations used in this article are D for Democratic members and R for Republican representatives. Other designations include Ind for Independent, Proh for Prohibition, Soc for Socialist and UL for Union Labor.