Pennsylvania sent 15 Democrats and 10 Republicans to the US House in 1978.

25 districts. Each row shows the winning party, margin, and member elected. Vote counts are the certified district totals.

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Pennsylvania — 1978 House districts

Source: MIT Election Data + Science Lab, US House returns (party-classified by literal ballot party).

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District	Won	Margin	Member elected	Votes
PA-01	D	+45.8%	Michael Myers	145,162
PA-02	D	+66.0%	William H Gray III	161,759
PA-03	D	+43.6%	Raymond F Lederer	119,765
PA-04	R	−11.6%	Charles F Dougherty	198,000
PA-05	R	−50.2%	Richard T Schulze	147,269
PA-06	D	+47.6%	Gus Yatron	144,177
PA-07	D	+0.9%	Robert W Edgar	158,714
PA-08	D	+22.3%	Peter H Kostmayer	146,052
PA-09	R	−49.8%	Bud Shuster	135,033
PA-10	R	−52.9%	Joseph M McDade	151,724
PA-11	D	+15.1%	Daniel J Flood	106,768
PA-12	D	+37.4%	John P Murtha	151,658
PA-13	R	−41.0%	R Lawrence Coughlin	159,862
PA-14	D	+15.1%	William S Moorhead	119,202
PA-15	R	−6.4%	Donald Lawrence Ritter	124,063
PA-16	R	−54.1%	Robert S Walker	119,296
PA-17	D	+19.3%	Allen E Ertel	132,847
PA-18	D	+15.0%	Doug Walgren	154,671
PA-19	R	−57.3%	William F Goodling	134,001
PA-20	D	+44.3%	Joseph M Gaydos	135,490
PA-21	D	+5.8%	Donald A Bailey	139,334
PA-22	D	+43.2%	Austin J Murphy	139,077
PA-23	R	−8.6%	William F Clinger JR	134,851
PA-24	R	−28.1%	Marc L Marks	135,935
PA-25	D	+4.2%	Eugene V Atkinson	146,948