1802–03 United States House of Representatives elections

← 1800 & 1801 April 26, 1802 – December 14, 1803 1804 & 1805 →
All 142 seats in the United States House of Representatives 72 seats needed for a majority
Majority party Minority party   Leader Nathaniel Macon John Cotton Smith Party Democratic-Republican Federalist Leader's seat North Carolina 6th Connecticut at-large Last election 68 seats 38 seats Seats won 103 39 Seat change 35 1
Results:      Federalist hold      Federalist gain      Democratic-Republican hold      Democratic-Republican gain      Undistricted
Speaker before election Nathaniel Macon Democratic-Republican Elected Speaker Nathaniel Macon Democratic-Republican

The 1802–03 United States House of Representatives elections were held on various dates in various states between April 26, 1802 (in New York) and December 14, 1803 (in New Jersey). Each state set its own date for its elections to the House of Representatives, either before or after the first session of the 8th United States Congress convened on October 17, 1803. They occurred during President Thomas Jefferson's first term in office.

With the addition of the new state of Ohio's representatives, and the congressional reapportionment based on the 1800 United States census, the size of the House increased from 106 to 142 seats. The greatest population growth revealed in the 1800 census was in territories that constituted the western regions of the country at the time, a tremendous boost for Democratic-Republican candidates. Nearly all of the new seats created in the reapportionment went to Democratic-Republicans, closely aligned as they were with the agrarian interests of Western farmers. As a result, the Democratic-Republicans won the largest proportion of seats that either they or the competing Federalists had ever been able to secure in any earlier Congress, a supermajority greater than two-thirds of the total number.

Election summaries

These elections were the first following reapportionment after the 1800 census. Thirty-five new seats were added in reapportionment,^[1] with three states having no change in apportionment, and thirteen states gaining between 1 and 7 seats. One further seat was added for the new state of Ohio, which is included in this table below.^[2]

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State	Type	Date	Total seats		Democratic- Republican		Federalist
			Seats	Change	Seats	Change	Seats	Change
New York	Districts	April 26–29, 1802	17	7	12	6	5	1
Connecticut	At-large	August 20, 1802	7		0		7
New Hampshire	At-large	August 30, 1802	5	1	0		5	1
Rhode Island	At-large	August 31, 1802	2		2		0
Georgia	At-large	October 4, 1802	4	2	4	2	0
Delaware	At-large	October 5, 1802	1		1	1	0	1
Pennsylvania	Districts	October 12, 1802	18	5	18	8	0	3
Massachusetts	District	November 1, 1802[a]	17	3	7		10	3
Vermont	Districts	December 13, 1802[b]	4	2	1		3	2
Maryland	Districts	January 1, 1803	9	1	6	1	3
South Carolina	Districts	February 3, 1803	8	2	6	3	2	1
Late elections (After the March 4, 1803, beginning of Congress)
Virginia	Districts	April 1803	22	3	18		4	3
Kentucky	Districts	August 2, 1803	6	4	6	4