Labour leader Jeremy Corbyn is due to visit an arts centre in Liverpool, while Liberal Democrat Tim Farron will attend a community picnic in Kendal in his constituency and Green leader Caroline Lucas will be at a church project in Brighton.
In Mrs Cox’s former constituency of Batley and Spen, in West Yorkshire, the Conservative, Labour, Liberal Democrat and Green candidates will come together at an event raising money for a special care baby unit.
The mother-of-two, 41, was shot and stabbed multiple times by right-wing extremist Thomas Mair in her constituency last June. He was later handed a whole-life prison sentence for her murder.
To mark the anniversary of her death, Mr Cox has organised the Great Get Together from June 16 to 18, where thousands of gatherings such as street parties, picnics and coffee mornings will be held across the country.