Deborah Erskine (born 1990 or 1991; née Armstrong) is a Democratic Unionist Party (DUP) politician from Northern Ireland.

[4] She had been considered a favourite for chairperson of the council in 2021 following the end of Diana Armstrong's term, however the role went to Errol Thompson of the DUP.

[5] Armstrong (Erskine following her marriage in late 2019[5]) was supportive of Arlene Foster when DUP MLAs and MPs signed a letter of no confidence in her leadership.

Along with Mid Ulster District Council councillor Kim Ashton, she criticised Christopher Stalford's handling of the fallout.

[13] She used her acceptance speech to praise Foster, saying that she "should be here today for re-election and I want to pay tribute to her for her work and dedication to this constituency and indeed, Northern Ireland.