Publishers Herald Newspapers Plc said the Ceredigion Herald will be published mainly in English but with "more Welsh content" than other weeklies.
It joins stablemates the Pembrokeshire Herald, the Carmarthenshire Herald and the Llanelli Herald.
It will have an initial print run of 10,000 and will cover from Aberystwyth to Cardigan in Ceredigion.
Managing editor Thomas Sinclair said: "I very much hope that the new paper will be as well received as the other three titles."
Publishers said the Ceredigion Herald will have three or four pages of Welsh every week and will also allow readers' letters, contributors' columns and obituaries in Welsh.
A new weekly newspaper, featuring both English and Welsh language content, will be launched on Friday.