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Plural of Trout

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.
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.