Frank B. Gallagher (pseudo. David Hogan) (1893 – 1962) was an Irish author and Volunteer.
A Cork native, initially London correspondent of William O'Brien's Cork Free Press, subsequently its final editor, though himself a separatist, personally admired O'Brien.
The paper suffered closure in 1916 soon after the appointment of Lord Decies as Chief Press Censor for Ireland. Decies warned the press to be careful about what they published. Gallagher also contributed to the nationalist newspaper New Ireland. Such warnings had little effect when dealing with such papers as the Cork Free Press. It was suppressed after Gallagher accused the British authorities of lying about the conditions and situation of republican prisoners in the Frongoch internment camp.
Gallagher worked alongside Erskine Childers on the Republican publicity staff and fought alongside Éamon de Valera during the Irish War of Independence. Gallagher and Robert Brennan were the significant contributors to the Irish Bulletin which was produced at this time. He would write several short stories for de Valera under various pseudonyms. Gallagher served long stints in prison due to his IRA involvement and went on many hunger strikes (the shortest lasting three days, the longest 41).
In December 1931 Gallagher was prosecuted by an Irish Free State Military tribunal for Seditious libel for publishing articles alleging Gardaí had mistreated the opponents (i.e. Anti-Treaty republicans) of the Irish Free State government, this was facilitated by Amendment No. 17 of Constitution of the Irish Free State, he was convicted and fined £50.