Irish and UK universities with a 2020 QS subject ranking for mathematics in the top 400 places.
<br>
<ol>
   <li> School of Mathematics and Statistics, University College Dublin </li>
   <li> School of Mathematics, Trinity College Dublin</li>
<li>    School of Mathematics, Statistics and Applied Mathematics, NUI Galway</li>
   <li> (UCC and QUB ranked below 400, mathematical schools at DCU, NUIM, TUD, UL unranked)</li>
</ol>
<ol><li>    Faculty of Mathematics, University of Cambridge
</li><li>     Mathematical Institute, University of Oxford
</li><li>     Department of Mathematics, Imperial College London
</li><li>     Mathematics Institute, Warwick
</li><li>    School of Mathematics, University of Edinburgh
</li><li>    Department of Mathematics, University College London
</li><li>    Department of Mathematics, Kings College London
</li><li>    Department of Mathematics, University of Manchester
</li><li>    School of Mathematics, University of Bristol
</li><li>    Department of Mathematics, London School of Economics
</li><li>    School of Mathematical Sciences, Queen Mary University of London
</li><li>    Department of Mathematical Sciences, University of Bath
</li><li>    School of Mathematics and Statistics, University of Glasgow
</li><li>    School of Mathematics, University of Birmingham
</li><li>    School of Mathematics, University of Leeds
</li><li>    Mathematical Sciences, University of Southampton
</li><li>    Department of Mathematical Sciences, Durham University
</li><li>    Department of Mathematics, School of Mathematical and Computer Sciences, Heriot-Watt University
</li><li>    Mathematics and Statistics, Lancaster University
</li><li>    School of Mathematical Sciences, Loughborough University
</li><li>    School of Mathematics and Statistics, Sheffield University
</li><li>    School of Mathematics, Cardiff University
</li><li>    Department of Mathematical Sciences, University of Liverpool
</li><li>    School of Mathematics and Statistics, University of St Andrews
</li><li>    Department of Mathematics & Statistics, School of Mathematics, Statistics and Physics, Newcastle University
</li><li>    Department of Mathematics, Swansea University
</li><li>    Department of Mathematics, College of Engineering, Mathematics and Physical sciences, University of Exeter
</li><li>    Department of Mathematics and Statistics, University of Strathclyde
</li><li>    Department of Mathematics, University of York 
</li><li>    Department of Mathematics, School of Natural and Computing Sciences, University of Aberdeen
</li>
</ol>