The phrase "a single citizen" is correct and usable in written English.
For example, you could use it in a sentence such as: "As a single citizen, I am passionate about voting in local elections to ensure that my voice is heard."
Indeed, 184 flats do not house a single citizen on the electoral roll.
Detective Vasquez was also the subject of a single citizen complaint, for discourtesy, but the disposition of the complaint was not available, officials said yesterday.
Several of their rivals -- Elizabeth Dole, Dan Quayle and Lamar Alexander -- quit the race before a single citizen voted with anything other than a checkbook.
Armenia celebrates 25 years of independence in 2016, although it is difficult to find a single citizen who would characterise the country as free and independent.
In addition, the government says, Mr. Rajaratnam is a citizen of both Sri Lanka and the United States, and not a single citizen of Sri Lanka has been extradited to face prosecution here.
"As a result of entering Russia, not a single citizen of Crimea should lose anything -- they need only to benefit from it," Mr Medvedev said in a news conference.
A check to every single citizen as a recognition of the value they're creating".
Obama said Sebelius would "go down in history" as the health and human services secretary in post when the country "finally declared that quality affordable healthcare is not a privilege, but a right for every single citizen".
On October 29th, in his farewell address before stepping down as president of the European Central Bank, Wim Duisenberg called the stability pact "a contract with every single citizen of the euro area" and one of the two pillars supporting the stability of the single currency (the other being the bank).
But if you love to hug a tree, an iceberg, polar bear or recently single citizen of the planet who is looking surprisingly like a polar bear these days, please reply.
McBean's estate protested in an appeal that "every single citizen eyewitness who saw what happened, indeed, even witnesses Peraza purported to rely on in his [brief], have stated unequivocally that Jermaine never pointed the unloaded airgun at Peraza or at anyone else".
