ICPEAC, the International Conference on Photonic, Electronic and Atomic Collisions (before 2000 known as the International Conference on the Physics of Electronic and Atomic Collisions), is a biennial scientific conference. It is held in late July. The first conference was held in New York City in 1958. Since then it has been held in the following locations:
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! #
! Location
! Year
|-
|I
|New York, NY, United States
|1958
|
|-
|XXVII
|Belfast, United Kingdom
|2011, 27 July - 2 August
|
|-
|XXVIII
|Lanzhou, China
|2013
|
|-
|XXX
|Cairns, Queensland, Australia
|2017, 26 July - 1 August
|
|-
|XXXI
|Deauville, France
|2019, 23 – 30 July
|
|-
|XXXII
|Virtual Event
|2021, 20 – 23 July
|
|-
|XXXIII
|Ottawa, Canada
|2023, 25 July – 1 August
|
|}