It’s a US citizen, a US company, a US bank, etc. We use “a” or “an” based on the sound made by the word that follows, not the spelling.
It’s a US citizen, a US company, a US bank, etc. We use a or an based on the sound made by the word that follows, not the spelling. Despite being a vowel, the initial letter of the word US produces a consonant sound (a “you” sound).
The new drug was patented by a US company.
The new drug was patented by an US company.
Remember, it is the sound, not the spelling, which is important.
The student is a US citizen.
The French government and a US company are locked in a dispute over privacy compliance.
Follow the same practice with other related expressions, such as a US corporation, a US army..., a US military..., a US senator, a US government, etc.
John was wearing a US army uniform.
Can we use a credit card from a US bank?
Similarly, we say "a United States citizen", "a United States senator", etc.
She is the daughter of a United States senator.
A partial list of words that also start with the vowel “u” but take the indefinite article “a”: