Julia Mary Yeomans (born 15 October 1954[4]) is a British theoretical physicist active in the fields of soft condensed matter and biological physics.

Her research investigates theoretical modelling of processes in complex fluids including liquid crystals, drops on hydrophobic surfaces, microchannels, as well as bacteria.

[13] She was elected a Fellow of the Royal Society (FRS) in 2013, where her nomination reads:[11] Julia Yeomans is distinguished for her development of novel numerical and analytical modelling tools to investigate a wide range of complex fluids.

New approaches are needed for these materials because the physics covers a wide range of length and time scales, from details of microscopic molecular interactions to collective hydrodynamics.

[15] Yeomans was appointed Officer of the Order of the British Empire (OBE) in the 2024 New Year Honours for services to physics.