The Survation poll, commissioned by the feminist campaign group Level Up, found that 29% of the 1,000 women who took part had been harassed on Facebook.
Women reported being sent offensive, graphic or insulting messages or images; having private photos posted without their consent and receiving repeated messages that made them fear for their safety.
Fifty-four per cent of those surveyed said they had little trust in Facebooks ability to deal with harassment in a compassionate manner, and 72% said it needed more moderators to handle complaints.
Fifty-six per cent of women under 25 and 40% of women from a black and minority ethnic background said they had been harassed at least once on Facebook.
Its campaign director, Janey Starling, said: Level Up is calling on Facebook to listen to women and move faster to keep us safe online.
This means firstly updating their harassment policy to recognise the nuances and spectrum that different types of harassment fall on, and secondly: making it easier for victims of harassment to report their abuse.
A government spokesperson said: The era of self-regulation is ending and our forthcoming white paper will set out the responsibilities of these companies to keep UK citizens safe, how they should be met and what should happen if they are not.
Original article