The main genealogical sources for research are;
The Tithe Applotment books 1824-1835
The Tithe Applotment books were compiled following an act of parliament of 1823. Tithe was a tax on land, payable to the Church of Ireland. The books are arranged by civil or Church of Ireland parish and townland. They list the occupiers of land, the amounts held by each and the amount of tithe payable.
Griffith 's Valuation 1857.
The valuation of property, commonly known as 'Griffith's Valuation', was compiled in the period 1848 to 1864. The valuations for Sligo were published in 1858. They are arranged by union, barony, civil parish and townland and show the head of household, lessor, description of tenement and area and valuation.
1901 and 1911 Census.
The two complete surviving census, pre-independence, are those for 1901 and 1911.
The household returns are arranged by District, Electoral Division and townland.
Catholic Clergy were required to keep records of Baptisms, Marriages and burials altough very few done so until the 1830's or later.
The Library possess Microfilm copies of all pre -1880 registers still extant for those Parishes of the dioceses of Achonry and Killala within the county boundary. Regretfully, only one Elphin parish, Aghanagh, is included.
Information in these records are, for the most part, concerned with or indirectly related to, the day-to-day management of a particular estate. The landlord's annual income and expenditure, the quality of his lands, the names of his tenants and their rents and labourers wages can all be gleaned from these sources.
The principal landed estates in the County are represented in our collection and are indexed separately.
Our Sligo Graveyard inscription collection of almost 40 volumes hold invaluable details regarding the inscription and location of individual family names within a specific graveyard. The Index to this collection can be accessed by contacting the Local History staff member on duty.
Many other miscellaneous surveys and listings
Maps and surveys.
Hearth money rolls.