How many seats did each party hold in the 2025 House of Representatives after the 2024 elections?

1. Final post‑election tally: razor‑thin Republican control

After all races were called, observers reported the 119th Congress would open with Republicans holding 220 seats to Democrats’ 215, giving the GOP a five‑seat margin in the full 435‑member chamber — a margin that commentators immediately described as “one of the smallest” in modern history ^{[1] [2]}. APM Research Lab’s reporting summarized the decisive call of California’s 13th as the moment the composition was set at 220–215 in favor of Republicans ^[1].

2. How that result was established and why it mattered

News organizations and data projects tracked results state‑by‑state; when the last uncalled seat (CA‑13) went to Democrat Adam Gray on Dec. 3, that completed the post‑election accounting and handed Republicans a bare majority ^[1]. The narrowness of the 220–215 split meant small shifts, special elections, or resignations could rapidly change control dynamics once the 119th Congress convened ^[2].

3. Conflicting snapshots and reporting cadence

Different outlets captured the House at slightly different moments. Statista’s snapshot of results as of Nov. 25, 2024 — citing NPR — showed Republicans had won 218 seats with three uncalled races remaining, illustrating that seat totals evolved over weeks after Election Day ^[3]. The decentralized, rolling nature of calling close races explains why some early tallies showed GOP control at the 218 threshold before the final 220–215 accounting ^{[3] [1]}.

4. What the headline numbers don’t show: vacancies and early changes

Post‑election developments affected the effective majority. Reporting noted that several members-elect or incumbents resigned or were expected to resign (for example Matt Gaetz’s resignation in November 2024 and other announced departures), and that special elections were expected in 2025 — factors that reduce the chamber’s day‑to‑day membership and could alter the practical majority ^{[4] [2]}. Sources flagged at least six special elections expected in 2025 and predicted that the slim 220–215 margin would shrink in the weeks after January 3, 2025 ^{[4] [2]}.

5. Broader consensus: Republicans won control of Congress in 2024

Multiple analyses placed the 2024 result in a larger context: voters handed Republicans control of both chambers (a slim Senate majority and the House) and the presidency, producing a GOP trifecta as of the post‑election accounting ^[1]. APM Research Lab explicitly noted Republicans gained a three‑seat Senate majority and maintained control of the House in addition to winning the presidency ^[1].

6. Limitations in the sources and lingering uncertainties

Available sources give a consistent final House figure of 220 Republicans and 215 Democrats after all calls; they also document earlier interim tallies (e.g., 218 R with uncalled races) and predict forthcoming churn from resignations and special elections ^{[3] [1] [4] [2]}. The provided materials do not supply a district‑by‑district breakdown here nor do they give a minute‑by‑minute timeline of every call; for that level of granularity consult the original AP, state secretaries’ offices or the detailed Wikipedia election tables cited in the results summary ^[5].

7. Why this narrow margin matters politically

A five‑seat difference in a 435‑member House leaves little room for defections, absences or vacancy‑driven flips; sources stress that the slim majority made Republican unity and the scheduling of special elections decisive to whether the GOP could govern effectively in early 2025 ^[2]. Reporting also highlights how quickly the effective majority can shift when members resign to join an administration or when vacancies trigger special elections ^{[4] [2]}.

If you want, I can produce the Wikipedia table‑style breakdown by party and by state/district using the cited sources ^{[5] [1]}, or track how the seat totals changed week‑by‑week between Election Day and Dec. 3, 2024 ^{[3] [1]}.