Plural of Kangaroo

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The Quick Answer
The plural of kangaroo is kangaroos.

The Plural of Kangaroo

The plural of kangaroo is kangaroos.
  • Kangaroos are often colloquially referred to as "roos".
  • Kangaroos are the only large animals to use hopping as a means of locomotion.
The noun kangaroo adheres to the standard rules for forming the plurals of nouns in English (shown in the table below).

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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 lamp
scythe
add s lamps
scythes
Noun Ending s, sh, ch, x or z bus
dress
add es buses
dresses
Nouns ending [consonant] o kangaroo
tomato
add either s or es
(There are no rules for this - you have to know.)
kangaroos
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 man
louse
some nouns undergo a vowel or letters change men
lice
More exceptions salmon
sheep
some nouns do not change at all salmon
sheep

Why Is There Confusion over the Plural of Kangaroo?

There is confusion because the rule for forming plurals with nouns ending in o isn't straightforward. Most nouns will just add an s. For example:
  • Solo becomes solos.
  • Zoo becomes zoos.
Some add es. For example:
  • Echo becomes echoes.
  • Hero becomes heroes.
With some words, both versions are accepted. For example:
  • Volcano becomes volcanoes or volcanos.
  • Halo becomes haloes or halos.
The plural of kangaroo is always kangaroos. Unfortunately, there is no clever way of knowing which nouns ending o follow which rules. You have to know. (For example, you have to know that kangaroo becomes kangaroos, but solo becomes solos.)

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.

See Also

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