The 2023–24 Harvard Crimson Men's ice hockey season was the 123rd season of play for the program and 62nd in ECAC Hockey. The Crimson represented Harvard University in the 2023–24 NCAA Division I men's ice hockey season, played their home games at Bright-Landry Hockey Center and were coached by Ted Donato in his 19th season.

Despite losing their top four scorers and starting goaltender from the previous season, Harvard was in the top-20 from earliest polls. To replace the departed talent, three NHL draftees were among the crop of freshman looking to help the Crimson return to the NCAA tournament. Unfortunately, very little went right for Harvard during the season. From the outset, the goaltending tandem of Koskenvuo and Mullahy did not play well enough to give the team a chance most nights. Over the course of the season, Harvard's goals against average was nearly a full goal more than it was the year before. Though Koskenvuo did possess marginally better numbers, it wasn't sufficient to give him the starting role outright.

Compounding the team's problems was a vast reduction in goal scoring. The team was unable to replace the offensive production lost to the professional ranks and, though three freshman did finish in the top 5 in team scoring (Callow, Johnson and MacDonald), their total combined contributions were less than what Harvard had received from Sean Farrell. Harvard scored 55 fewer goals than they had in 2023 and finished as one of the worst offensive teams in the nation. The team's situation was particularly dire in the first half of the year as the Crimson won just once in its first 14 games. Some improvements were seen in the second half but in the end Harvard posted one of its worst campaigns in decades. The seven wins on the year was the lowest number for the program since 1979.

As of August 2, 2023.^[1]

More information No., S/P/C ...

No.	S/P/C	Player	Class	Pos	Height	Weight	DoB	Hometown	Previous team	NHL rights
1		Max Miller	Senior	G	6' 2" (1.88 m)	180 lb (82 kg)	2001-08-02	Ann Arbor, Michigan	Janesville (NAHL)	—
2		Ian Moore (C)	Junior	D	6' 3" (1.91 m)	185 lb (84 kg)	2002-01-04	Concord, Massachusetts	Chicago (USHL)	ANA, 67th overall 2020
5		Mason Langenbrunner	Sophomore	D	6' 3" (1.91 m)	179 lb (81 kg)	2002-09-14	Eden Prairie, Minnesota	Fargo (USHL)	BOS, 151st overall 2020
7		Philip Tresca	Sophomore	F	6' 0" (1.83 m)	190 lb (86 kg)	2002-04-10	Newton, Massachusetts	Muskegon (USHL)	—
8		Alex Gaffney	Junior	F	5' 8" (1.73 m)	170 lb (77 kg)	2002-06-25	West Orange, New Jersey	Waterloo (USHL)	—
9		Ryan Healey	Sophomore	D	6' 0" (1.83 m)	172 lb (78 kg)	2004-05-19	Hull, Massachusetts	Sioux Falls (USHL)	MIN, 121st overall 2022
10		David Hejduk	Freshman	D	6' 0" (1.83 m)	194 lb (88 kg)	2004-01-03	Parker, Colorado	Wenatchee (BCHL)	—
11		Ryan Fine	Freshman	F	5' 9" (1.75 m)	183 lb (83 kg)	2005-03-14	Center Moriches, New York	NTDP (USHL)	—
12		Joe Miller	Sophomore	F	5' 9" (1.75 m)	160 lb (73 kg)	2002-09-15	Minneapolis, Minnesota	Chicago (USHL)	TOR, 180th overall 2020
13		Marek Hejduk	Sophomore	F	6' 0" (1.83 m)	184 lb (83 kg)	2004-01-03	Parker, Colorado	NTDP (USHL)	—
14		Matthew Morden	Freshman	D	6' 4" (1.93 m)	203 lb (92 kg)	2004-07-29	Hamilton, Ontario	Muskegon (USHL)	ARI, 131st overall 2022
15		Luke Khozozian	Junior	F	5' 10" (1.78 m)	180 lb (82 kg)	2001-04-21	Weston, Massachusetts	East Coast (EHL)	—
18		Michael Callow	Freshman	F	6' 4" (1.93 m)	181 lb (82 kg)	2004-01-15	Boston, Massachusetts	Muskegon (USHL)	ANA, 154th overall 2022
19		Ben MacDonald	Freshman	F	6' 0" (1.83 m)	181 lb (82 kg)	2004-02-24	Weston, Massachusetts	West Kelowna (BCHL)	SEA, 91st overall 2022
20		Tommy Lyons	Junior	F	6' 0" (1.83 m)	185 lb (84 kg)	2000-04-01	East Falmouth, Massachusetts	Chilliwack (BCHL)	—
21		Cam Johnson	Freshman	F	5' 9" (1.75 m)	146 lb (66 kg)	2004-11-28	Vancouver, British Columbia	Chicago (USHL)	—
23		Salvatore Guzzo	Freshman	F	5' 11" (1.8 m)	168 lb (76 kg)	2005-04-17	Old Tappan, New Jersey	NTDP (USHL)	—
24		Jack Bar	Junior	D	6' 2" (1.88 m)	195 lb (88 kg)	2002-10-24	Newmarket, Ontario	Chicago (USHL)	DAL, 138th overall 2021
26		Ryan Drkulec	Senior	F	6' 6" (1.98 m)	197 lb (89 kg)	2000-09-22	Westlake, Texas	Lone Star (NAHL)	—
29		Casey Severo	Sophomore	F	5' 9" (1.75 m)	177 lb (80 kg)	2001-02-01	Penfield, New York	Madison (USHL)	—
30		Aku Koskenvuo	Sophomore	G	6' 4" (1.93 m)	173 lb (78 kg)	2003-02-26	Espoo, Finland	HIFK U20 (U20 SM-sarja)	VAN, 137th overall 2021
33		Kyle Aucoin	Junior	D	6' 0" (1.83 m)	175 lb (79 kg)	2002-07-02	Ottawa, Ontario	Muskegon (USHL)	DET, 156th overall 2020
35		Derek Mullahy	Senior	G	6' 0" (1.83 m)	190 lb (86 kg)	2001-03-20	Scituate, Massachusetts	Des Moines (USHL)	—
43		Christian Jimenez	Junior	D	5' 9" (1.75 m)	195 lb (88 kg)	2002-03-15	Yorktown Heights, New York	Sioux City (USHL)	—
59		Zakary Karpa (C)	Junior	F	6' 2" (1.88 m)	190 lb (86 kg)	2002-03-25	Newport Beach, California	Des Moines (USHL)	NYR, 191st overall 2022

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Note: USCHO did not release a poll in weeks 11 and 25.^[4]
Note: USA Today did not release a poll in week 12.