This is the results breakdown of the Congress of Deputies election held in Spain on 22 June 1986. The following tables show detailed results in each of the country's 17 autonomous communities and in the autonomous cities of Ceuta and Melilla, as well as a summary of constituency and regional results.^{[lower-alpha 1][1][2]}

Quick Facts Main: 1986 Spanish general election, Party ...

	Main: 1986 Spanish general election
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Party		Votes	%	Seats
	PSOE	8,901,718	44.1%	184
	AP–PDP–PL	5,247,677	26.0%	105
	CDS	1,861,912	9.2%	19
	PRD–CiU–CG	1,288,768	6.4%	19
	IU	935,504	4.6%	7
	EAJ/PNV	309,610	1.5%	6
	HB	231,722	1.1%	5
	EE	107,053	0.5%	2
	PAR	73,004	0.4%	1
	Others	1,245,951	6.2%	2
Total		20,202,919	100.0%	350

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348 members of the Congress of Deputies were elected using the D'Hondt method and a closed list proportional representation, with an electoral threshold of three percent of valid votes—which included blank ballots—being applied in each constituency. Seats were allocated to constituencies, corresponding to the provinces of Spain, with each being allocated an initial minimum of two seats and the remaining 248 being distributed in proportion to their populations. Ceuta and Melilla were allocated the two remaining seats, which were elected using plurality voting. The D'Hondt method might result in a higher effective threshold, depending on the district magnitude.^[3]

As a result of the aforementioned allocation, each Congress multi-member constituency was entitled the following seats:^[4]

Voting was on the basis of universal suffrage, which comprised all nationals over eighteen and in full enjoyment of their political rights.^[5]

The electoral law allowed for parties and federations registered in the interior ministry, coalitions and groupings of electors to present lists of candidates. Parties and federations intending to form a coalition ahead of an election were required to inform the relevant Electoral Commission within ten days of the election call, whereas groupings of electors needed to secure the signature of at least one percent of the electorate in the constituencies for which they sought election, disallowing electors from signing for more than one list of candidates.^[6][7]