Roscoe Tanner defeated Guillermo Vilas in the final, 6–3, 6–3, 6–3 to win the men's singles tennis title at the January 1977 Australian Open.^[1] It was his first and only major singles title. Tanner was making his tournament debut. This was the first Australian Open men's singles final since 1912 not to feature an Australian player.

Mark Edmondson was the defending champion, but lost in the quarterfinals to Ken Rosewall.^[1]

The seeded players are listed below. Roscoe Tanner is the champion; others show the round in which they were eliminated.

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• r = Retired

	Quarterfinals									Semifinals									Final
	1	Guillermo Vilas	6	7	1	6
		Ross Case	4	5	6	3
										1	Guillermo Vilas	6	1	6	6
											John Alexander	4	6	3	4
	3	Arthur Ashe	3	4	6	6
		John Alexander	6	6	4	7
																			1	Guillermo Vilas	3	3	3
																			2	Roscoe Tanner	6	6	6
		Mark Edmondson	4	6	6	4
	4	Ken Rosewall	6	7	4	6
										4	Ken Rosewall	4	6	4	1
										2	Roscoe Tanner	6	3	6	6
		Phil Dent	3	4	2
	2	Roscoe Tanner	6	6	6

	First round									Second round									Third round									Quarterfinals
	1	G Vilas	6	6	6
		P McNamee	2	4	2					1	G Vilas	6	6	6
		N Saviano	7	7	6						N Saviano	1	4	4
		T Wilkison	5	6	4														1	G Vilas	7	6	6
		C Pasarell	2	7	6	7														C Pasarell	6	2	3
		B Hewitt	6	6	2	6					C Pasarell	7	7	6
		R Drysdale	3	2	4						S Docherty	6	6	4
		S Docherty	6	6	6																							1	G Vilas	6	7	1	6
		D Stockton	2	7	6	7																							R Case	4	5	6	3
		J Feaver	6	6	2	6					D Stockton	6	6	6
		C Fancutt	4	4	7	6	6				C Fancutt	2	2	3
		A Gardiner	6	6	6	4	4													D Stockton	4	6	7	5	2
		R Case	3	6	7	6														R Case	6	4	6	7	6
		C Lewis	6	1	6	1					R Case	6	6	6
		B Drewett	6	3	1	1					B Lloyd	3	3	1
		B Lloyd	4	6	6	6

	First round									Second round									Third round									Quarterfinals
	3	A Ashe	6	6	6
		P McNamara	3	0	3					3	A Ashe	7	7	6
	LL	H Elschenbroich	6	3	3	3					DR Bohrnstedt	6	5	4
		DR Bohrnstedt	3	6	6	6													3	A Ashe	7	6	3	6
		G Masters	6	3	0	3														H Pfister	6	3	6	3
		H Pfister	3	6	6	6					H Pfister	4	6	6	6
		A Stone	3	7	1	4					C Letcher	6	1	4	1
		C Letcher	6	6	6	6																						3	A Ashe	3	4	6	6
		R Ruffels	7	6	6																								J Alexander	6	6	4	7
		P Kronk	5	1	4						R Ruffels	6	6	3	6	1
		C Dibley	6	6	6						C Dibley	4	2	6	7	6
		K Warwick	1	3	2															C Dibley	4	2	2
		J Alexander	7	7	6	6														J Alexander	6	6	6
		M Machette	6	6	7	4					J Alexander	6	6	5	6
		U Marten	6	7	6						U Marten	2	4	7	4
	Q	G Thomson	2	5	3

	First round									Second round									Third round									Quarterfinals
		B Giltinan	2	7	4	4
		R Lewis	6	6	6	6					R Lewis	6	6	6
		R Simpson	3	2	2						T Gorman	4	3	1
		T Gorman	6	6	6															R Lewis	1	3	3
		J Bartlett	7	6	4	6														M Edmondson	6	6	6
		J Trickey	6	2	6	4					J Bartlett	4	6	1	2
	Q	B Carmichael	4	3	3						M Edmondson	6	1	6	6
		M Edmondson	6	6	6																								M Edmondson	4	6	6	4
		E van Dillen	6	6	6																							4	K Rosewall	6	7	4	6
		C Kachel	3	2	0						E van Dillen	6	6	3
		JC Hagey	6	6	3	6	3				M Riessen	7	7	6
		M Riessen	7	2	6	3	6													M Riessen	7	6	5	6	4
	Q	P Campbell	0	4	4														4	K Rosewall	6	7	7	3	6
		I Țiriac	6	6	6						I Țiriac	4	6	4
		S Ball	2	3	5					4	K Rosewall	6	7	6
	4	K Rosewall	6	6	7

	First round									Second round									Third round									Quarterfinals
		S Stewart	6	6	6	7
		GR Reid	7	3	4	6					S Stewart	4	3	3
		J James	5	6	2						P Dent	6	6	6
		P Dent	7	7	6															P Dent	6	6	7
		W Zirngibl	6	3	6	6														D Crealy	3	3	6
		J Marks	4	6	2	1					W Zirngibl	5	6	0	r.
		V Amaya	3	6	6	6	5				D Crealy	7	7	3
		D Crealy	6	1	7	1	7																						P Dent	3	4	2
	Q	W Lofgren	6	6	6																							2	R Tanner	6	6	6
	LL	M Meyers	3	2	3					Q	W Lofgren	1	0	2
	Q	W Maher	6	3	0						T Roche	6	6	6
		T Roche	7	6	6															T Roche	6	1	2	1
		P Fleming	6	5	6	6													2	R Tanner	4	6	6	6
		B Phillips-Moore	0	7	1	2					P Fleming	6	2	1
		B Teacher	3	7	3	5				2	R Tanner	7	6	6
	2	R Tanner	6	5	6	7

• Australian Open (1977) on ATPWorldTour.com
• 1977 Australian Open (January) – Men's draws and results at the International Tennis Federation