Plural of Trout

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The Quick Answer
The plural of trout is trout.

The Plural of Trout

The plural of trout is trout.
  • Trout are closely related to salmon.
  • Young trout are referred to as troutlet, troutling or fry.

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The Standard Rules for Forming the Plurals

The table below shows the standard rules for forming the plurals of nouns in English.
Type Example of Type Forming the Plural Plural
Most Nouns cat
scythe		 add s cats
scythes
Noun Ending s, sh, ch, x or z bus
dress		 add es buses
dresses
Nouns ending [consonant] o mango
zero
tomato		 add either s or es
(There are no rules for this - you have to know.)		 mangoes or mangos
zeros
tomatoes
Nouns ending [vowel] o patio
ratio 		add s patios
ratios
Nouns ending [consonant] y story
penny		 change the y to an i and add es stories
pennies
Nouns ending [vowel] y storey ()
donkey 		add s storeys
donkeys
Nouns ending f or fe dwarf
knife 		ves and/or s
(There are no rules - you have to know.)		 dwarfs
knives
Exceptions goose
louse 		some nouns undergo a vowel or letters change geese
lice
More exceptions salmon
trout 		some nouns do not change at all salmon
trout

Why Is There Confusion over the Plural of Trout?

Trout is the only way to make the noun trout plural.

Confusion arises because trout remains unchanged in its plural form. Unfortunately, there is no clever way of knowing which nouns follow which rules. You have to know.
Another Interactive Exercise
Here are three randomly selected questions from another exercise on plurals, which can be edited, printed to create an exercise worksheet, or sent via email to friends or students.

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See Also

Unusual pluralsPlural forming table Quirks with forming plurals Forming the plurals of abbreviations Forming the plurals of compound nouns