Roscommon was a parliamentary constituency represented in Dáil Éireann, the lower house of the Irish parliament or Oireachtas from 1923 to 1969 and from 1981 to 1992.
The method of election was proportional representation by means of the single transferable vote (PR-STV).
The seat was won by the Fine Gael candidate Joan Burke, widow of the deceased TD.
Gallagher notes [35] it is unclear as to why the returning officer proceeded with the elimination of O'Dowd on the final count.
Following the resignation of Cumann na nGaedheal TD Henry Finlay, a by-election was held on 11 March 1925.