The invasive pest Bactericera cockerelli, commonly known as tomato potato psyllid (TPP), is native to North America and has recently invaded Australasia. TPP is also the vector of the bacterial plant pathogen Candidatus Liberibacter solanacearum (CLso), which has caused severe economic losses for potato growers worldwide. We estimated the potential global geographical distribution of TPP under current and future climatic scenarios using CLIMEX. In its native range, TPP is predicted to expand its current geographical range in semi-arid, temperate, and continental climates. Globally, the model predicts that several countries in Europe and East Asia are climatically suitable for establishing TPP. Predictions under a future climate change scenario (CSIRO Mk 3.0 for 2090) showed a significant reduction of the geographical range of TPP with a possible expansion towards higher altitudes. However, our model suggested that most regions in Europe and New Zealand will remain unchanged or will become more favourable in the future. The CLIMEX projections for current and future climatic distribution provide valuable information for existing and future biosecurity preparedness and management programmes, which may prove helpful in risk assessments and identifying potential areas that are likely to be susceptible to a TPP invasion.