More than 50 sexual assaults including rape were reported by holidaymakers to British authorities in Turkey last summer.
The figure was disclosed in a Foreign Office travel advisory to the country on Monday.
The latest update by the Foreign, Commonwealth & Development Office follows figures suggesting the country attracted 51.5 million foreign visitors in 2022 and aims to draw 60 million this year, bringing in $56 billion in revenue.
The FCDO update said: “In 2022, 51 cases of sexual assault, including rape, were reported to British consular staff in Turkey.
“Most of these cases occurred during the summer holiday period in coastal tourist areas. Many were committed at night by someone the victim met during the day.
“There have also been sexual attacks on minors visiting toilet facilities alone. You should be extra vigilant in these situations.
“Never accept lifts from strangers. Find a registered yellow taxi and make a note of the registration number before getting in.
“Very rarely counterfeit alcohol has been responsible for the death of some tourists. If you have any concerns, seek advice from your tour operator or the Turkish authorities.”
British tourists were also warned that passports have been stolen from rented villas, even when they have been kept in safes.
“This is a particular problem in Didim, Kas, Kalkan and the Fethiye/Hisaronu/Ovacik areas,” the FCDO added.
The advisory pointed out that generally crime levels are low, but street robbery and pick-pocketing are common in the major tourist areas of Istanbul.
“You should maintain at least the same level of personal security awareness as in the UK,” it added.
“Alcohol and drugs can make you less alert, less in control and less aware of your environment. If you are going to drink, know your limit.
“Drinks served in bars overseas are often stronger than those in the UK. Buy your own drinks and keep sight of them at all times so they are not spiked. Be wary of strangers approaching you offering food and drink (which may be drugged), to change money or to take you to a restaurant or nightclub.”