The banking giant made the announcement as it said it would invest more than £30 million in its remaining 594 branches, including refurbishments of 49 of them.
Under the plans, staff in ten branches, which employ 46 people between them, could face losing their jobs. The banks says it will move staff working at the other 17 branches earmarked for closure to other nearby sites.
The bank said the closures are in response to a changing banking scene, claiming nine in ten customer interactions happen over the phone, online or through its app.
It said the number of customers using traditional branches have stumbled by a third in since 2015.
Just one in every 100 cash withdrawals are made in a HSBC branch, the bank said. The bank said it wanted to ensure it is "fit for the future" and changes to the way customers interact are "something we cannot ignore".
The first closures will be made in early July, with branches in London, Bristol, Swindon and Leigh-on-Sea set to be axed. Customers will be able to use their local Post Office to access their bank accounts.
It comes as the bank announced plans to axe some 35,000 staff globally. It said it would introduce "meaningful" cuts in the UK, where it has 40,000 employees.
Is my local HSBC branch set to close - and when?
The branch closures where jobs are at risk:
Park Royal, London – to close on July 3
Peterlee – July 10
Chard – July 10
Royston – July 10
Tiverton – July 31
Ely – July 31
Pembroke – July 31
Saffron Walden – July 31
Thetford – to close later in 2020
Bourne – to close later in 2020
The branch closures where jobs will be moved to nearby sites:
Bedminster, Bristol – to close on July 3
Leigh-on-Sea – July 3
Chingford – July 3
Old Town, Swindon – July 3
Kensington High Street, London – July 3
Blaby – July 10
Bradshawgate, Leigh – July 10
Wallasey – July 10
Pudsey – July 10
Wellesley Road, Croydon – July 31
Greenwich, London – to close later in 2020
Regent Street, London - to close later in 2020
Redhill – to close later in 2020
Broomhill, Sheffield – to close later in 2020
Bath Road, Cheltenham – to close later in 2020
Corporation Street, Coventry – to close later in 2020
Heswell – to close later in 2020