Hayfork may refer to:

• Pitchfork, a tool that farmers use to manually move hay
• Hay fork (machine), the grapple device used together with ropes and pulleys to move hay from a hay wagon to a haystack in a barn loft
• Hayfork, California, a census-designated place in Trinity County, California

• 1988–89 North American drought
• 1988–89 Northern Premier League
• 1988–89 North West Counties Football League
• 1988–89 Oklahoma Sooners men's basketball team
• 1988–89 Phoenix Suns season
• 1988–89 Portuguese Liga
• 1988–89 Port Vale FC season
• 1988–89 Port Vale F.C. season
• 1988–89 Port Vale season
• 1988–89 Primeira Divisão
• 1988–89 Princeton Tigers men's basketball team
• 1988–89 Qatar Stars League
• 1988–89 QMJHL season
• 1988–89 Quebec Nordiques season
• 1988–89 Rangers F.C. season
• 1988–89 Rugby Football League season
• 1988–89 Saudi Premier League
• 1988–89 Scottish Football League
• 1988–89 Segunda Division
• 1988–89 Segunda Division B
• 1988–89 Segunda División B
• 1988–89 Serie B
• 1988–89 Slough Jets season
• 1988–89 Slovenian Republic League
• 1988–89 Southern Hemisphere tropical cyclone season