The total number of vaccinations in Turkey reached 20,515,204, the Health Ministry said on April 21, almost four months after the country started inoculations.
Istanbul had the highest number of vaccinations nationwide with some 3,271,467 people having received at least one dose.
Some 1,644,466 people in the capital Ankara received at least one dose, while Aegean İzmir remained at 1,396,668 inoculations.
Mediterranean tourism hub Antalya reported a mere 693,971 vaccinations, while southeastern Diyarbakır only had 191,913 people receive at least one dose of the treatment.
In Turkey, second only to India in new coronavirus cases, a recent surge has brought active infections to a peak equivalent to nearly 1% of working age people, a calculation based on Health Ministry data showed on April 20.
Deaths from COVID-19 hit a record 341 on April 19 despite more than 20 million vaccines having been administered.
About 551,000 Turks have active COVID-19 cases, compared to a working age population of some 57 million, based on a Reuters calculation of official deaths, recoveries and total cases.
The country, with a population of 84 million, ranks fourth globally in new virus cases on a seven-day average, according to Reuters data.