Mushmouth may refer to:

• Mushmouth, a character from the comic strip Moon Mullins
• Mushmouth, a character from the animated cartoon Fat Albert and the Cosby Kids
• Skipjack tuna
• Mushmouth may also refer to the character Mushmouth Thomas frequently featured on The Dunham and Miller Show on The Ticket in Dallas

• New Zealand Central Bank
• New Zealand Centre for Sustainable Cities
• New Zealand Chamber Soloists
• New Zealand Children's Book Awards
• New Zealand Children's Book of the Year
• New Zealand Children's Book of the Year Award
• New Zealand Children’s Book Awards
• New Zealand Children’s Book of the Year
• New Zealand Children’s Book of the Year Award
• New Zealand-China Free Trade Agreement
• New Zealand Chinese Students' Association
• New Zealand Civil Air Authority
• New Zealand Class 30 Locomotive
• New Zealand CND
• New Zealand coat of arms
• New Zealand College of Business
• New Zealand Computer Society
• New Zealand Constitutional Advisory Panel
• New Zealand Constitutional Review Panel
• New Zealand Contributions to Human Rights Instruments
• New Zealand contributions to human rights instruments
• New Zealand Convalescent Hospital
• New Zealand Cooperatives Association
• New zealand cooperatives association
• New Zealand coot