The University of Sussex was ranked 20th in the UK and 160th in the world by the Times Higher Education World University Rankings 2021. The Sunday Times placed the university in 19th place nationally, that same year. The University was ranked 15th in the UK by the Complete University Guide in 2017. The University was ranked 228th in the world according to the QS World University Rankings 2018; it placed 187th in 2017. The University was ranked 205th the 2018 CWTS Leiden Ranking. Sussex ranked as 66th in the world in 2016 for its sustainability on the UI GreenMetric ranking.