Coun Caroline Makinson has been in post for the last 19 months but Coun Tattersall, who has represented the St Helen’s ward since 2012, will formally be elected.
She will be joined with her son, Ethan, as her consort for the year - and has chosen Romero Communities and Hey! Let’s Talk (formerly TADS) as her two charities for the year.
She said: “I am absolutely delighted to be taking on the role of mayor for my hometown.
“The role is an honour and privilege, and I will do my absolute best to fulfil my mayoral responsibilities.
“I will continue my commitment to keeping people safe and well and to supporting and strengthening our wonderful communities.
“I’ve decided that my mayoral theme for the year will be to ‘Educate, Inspire and Deliver’ as I feel that now, more than ever, we need to support our young generations who have been so badly affected by the pandemic.
“I’m looking forward to offering support in any way I can and want to shine a light on all the positives that we’re achieving as we come back stronger from the pandemic.”