Plural of Stadium

The Plural of Stadium

The plural of "stadium" is "stadiums" or "stadia."

• I'm not just selling out Yankee Stadium; I'm selling out stadiums in Mexico and Argentina.
• I've worn a 100% polyester cheerleading outfit in stadia full of people – it is pretty hard to embarrass me.

The noun "stadium" has a Latin root, which is the derivation of the plural "stadia." Through common usage, "stadiums" (which adheres to the standard rules for forming plurals) is also now acceptable.

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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	stadium scythe	add s	stadiums scythes
Noun Ending s, sh, ch, x or z	box dress	add es	boxes dresses
Nouns ending [consonant] o	hero zero tomato	add either s or es (There are no rules for this - you have to know.)	heroes 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	donkey chimney	add s	donkeys chimneys
Nouns ending f or fe	dwarf hoof	ves and/or s (There are no rules - you have to know.)	dwarfs hooves or hoofs
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
Foreign rulings	stadium medium	some nouns adopt foreign rulings	stadia media

Read more about English spelling rules.

Why Is There Confusion over the Plural of Stadium?

Confusion arises over the plural of "stadium" because its original plural form ("stadia") derives from Latin and native English speakers are drawn to "stadiums," which adheres to the standard ruling for forming plurals.

Both "stadia" and "stadiums" are acceptable, but "stadiums" has become the more common plural and the safest option. (See the evidence in Google's Ngram Viewer.) (Of note, due to the release of the Google Stadia, the word has recently increased in popularity.)