James Weir (5 March 1845, in St Pancras – 27 August 1905, in London) was a British Wesleyan Methodist architect who designed mainly for the Wesleyan Methodist Church in London and the south east of England.
He set up in independent practice in 1873, was elected an Associate of the Royal Institute of British Architects in 1874, and a Fellow in 1882.
At the start of his independent career in 1873, Weir, aged 28, obtained a commission through a limited competition to design a new Wesleyan Church at Clapham to accommodate 1,050.
Following this successful project he went on to design a further 28 chapels in London and South East England.
Weir's chapel output could have been greater had not commercial interests governed his career so strongly from 1890 onwards.