The Fermanagh Family History Society produces a periodical, Fermanagh Roots, and provides access to a number of resources, including David Elliott's Master Burial List for Fermanagh.
For Roots Ireland records for County Fermanagh, go to: https://rootsireland.ie/fermanagh/online-sources.php
The IGP County Fermanagh site hosts a range of sources, including a large collection of headstone photographs (see also IGP Archives County Fermanagh).
A substantial set of books as well as other materials relating to County Fermanagh are available in the Heritage Collection in Enniskillen Library.
See also the Fermanagh & Omagh Museum & Heritage Collections Online and the archives held by the Inniskillings Museum.
General reading
Peadar Livingstone, The Fermanagh Story: A Documented History of the County Fermanagh from the Earliest Times to the Present Day (1969)
Patrick J. Duffy, Landscapes of South Ulster: A Parish Atlas of the Diocese of Clogher (1993)
Brian S. Turner, Surname Landscape in the County of Fermanagh (2002) [folding map]
Eileen M. Murphy and William J. Roulston (eds), Fermanagh: History and Society (2004)
Newspapers
Enniskillen Advertiser and North Western Counties Gazette, 1864–7
Enniskillen Chronicle and Erne Packet, 1808–49
Enniskillen Press and Northern Advertiser, 1895–1907
Enniskillener or Fermanagh Constitution, 1830–40
Fermanagh Herald (Enniskillen), 1902–
Fermanagh Mail and Enniskillen Chronicle, 1849–93
Fermanagh News and Cavan, Leitrim, Monaghan and South Tyrone Advertiser (Enniskillen), 1894–
Fermanagh Times (Enniskillen), 1880–
Impartial Reporter (Enniskillen), 1825–
Lisbellaw Gazette and County Fermanagh Advertiser, 1879–1903
Newtownbutler Herald, 1894–7
Directories
Lowe’s Fermanagh Directory and Household Almanac (1880)
Journals
The Clogher Record, the journal of the Clogher Historical Society (covering the diocese of Clogher), was first published in 1953 and contains numerous articles on aspects of the history of Fermanagh. It is available on JSTOR.
County Fermanagh Grand Jury
Presentment books for the county at large, 1792–1819, 1822–33 (FER/4/3)
Presentment books for the baronies of Coole, 1808–33; Magherastephana, 1808–33; Tyrkennedy, 1808–33; Glenawley, 1809–32; Knockninny, 1809–33; Magheraboy, 1809–33; and Lurg, 1827–33 (FER/4/2)
Presentment books, 1847, 1854, 1874–5, 1879–80, 1892–98 (FER/4/1)
County surveyor’s reports, 1896–7 (FER/4/4)
Account book listing salaries paid to county officials, 1822–46 (FER/4/7/1)
Grand jury bill book containing a register of bills of indictment at the assize courts, 1792–1861 (FER/4/8/1)
Affidavits concerning tree planting, 1896–1901 (FER/7/3/1)
County Council
Fermanagh Council Council (LA/4)
Rural District Councils
Belleek - originally Ballyshannon No. 2 (LA/75)
Clones No. 2 (LA/76)
Enniskillen - originally Enniskillen No. 1 (LA/36)
Irvinestown - originally Irvinestown No. 1 (LA/39)
Lisnaskea (LA/49)
Poll book, 1747–68 (T808/15063)*
Register of freeholders arranged alphabetically, c. 1788 (D1939/3/1)*
Poll book, 1788 (T543/1; T808/15075; MIC353/1)*
Freeholders register, 1796–1802 (D1096/92)*
Lists of freeholders, no dates given [18th century] (John Rylands Library, Manchester, B 3/26/1–145)
List which appears to be of freeholders registered in the years 1812–19 (D3007/H/7/6)
Box of miscellaneous papers including registers of voters, 1880–81 (BG/14/O/2)
List of voters and agents in North Fermanagh, 1885–6 (D1390/26/2/5)
Voters’ lists, 1895–1939 (FER/5/2/1)
Registers of voters, 1895–1946 (FER/5/2/3)
‘List of Persons objected to in the year 1907 … [in the] … Parliamentary Polling district of Roslea’ (T3181/1B)
* Included in the PRONI Freeholders' Database