1 in 5 Londoners feel anxious a lot of the time while more than 40% feel anxious at least once a week.
Personal relationships cause anxiety for 27% of those in the capital, money worries are the main concern for 43% and welfare of loved ones causes anxiety for around a third.
The revelations come from a survey by the Mental Health Foundation for Mental Health Awareness week.
More top news
An English springer spaniel given to the UK Border Force has become a star new recruit for sniffing out smuggled cash.
Celine Dookhran, 20, was allegedly kidnapped by her relative Mujahid Arshid, 33, and his employee Vincent Tappu, 28, on July 19 last year.
Collins hid the device, two sim cards and two memory sticks inside a crutch while on remand in September.