Townland Maps

The Auld Sod

Shamrock FlagPrelude

Shamrock FlagTowey Farmland 1856 to 1933

    • Earliest recording of Towey farmland, by name, acreage and value, was in the Griffith’s Valuation Survey. For Ballaghaderreen area it was completed in 1856. Most land was owned by the British Viscount Dillon and leased to Irish occupiers.
    • Using Griffith’s Valuation Survey and Ireland Valuation Office records, Dick Towey, Corvallis, OR, during the 1980s to 2000s, compiled spreadsheets of Towey farmland occupiers and ownership from 1856 to 1933. Dick was our Clan Genealogist and Historian from August 2004 to August 2012.
    • When reading farmland acreage, note that Dick gives the U.S. acreage, having calculated it from Griffith’s British system.
    • His various spreadsheets are:

Townland Population, Houses & Acres Ballaghaderreen Area
Towey & Variant Names in Griffith’s Valuation 1856
Barnaboy & Cashelard Farmland List 1856-1933
Broher & Bockagh Farmland Towey 1855 – 1933

Shamrock FlagGriffith’s Valuation Survey of 1856

    • The Griffith’s Valuation Survey is a detailed register, by county and townland, listing the map location, the family head (occupier), the property owner (Viscount Dillon), description (land, house, offices), acreage and value. “Offices” are outbuildings such as a cowshed, stable, mill or even a privy. The map reference helps locate our ancestor farmland; however, many Toweys have the same name which makes it difficult to pinpoint each ancestor’s specific farmland. Family lore or a local citizen in Ireland may help.
    • Griffith’s Valuation Survey is available online at  Remember that most Ballaghaderreen area townlands were in Co. Mayo during this survey period.
    • When at Ask About Ireland, type the Family Name and select the County from the drop down list. Type the First Name  if desired then click the Search button.
      >>> Note the following example:

Griffiths Ask Ireland

    • Click the larger Original Page  icon for a townland occupier list.  Its Reference to Map (in first column) is keyed to locations on the Griffith map. Click the larger Map Views icon to locate a map view of that townland and farmland. However, you must zoom in and move about the map to locate the townland and a Reference to Map location.
    • Irish a, r, p land measurements in 1800s were: acre = 43,560 sq ft; rood  = 10,890 sq ft; perch = 272.25 sq ft.  Valuation £ = English pound, s = shilling and d = pense. One pound = 20 shillings and each shilling = 12 pense. Ireland converted from British pound to the metric and Euro systems during 1970s to 2005.
    • Another Griffith’s Valuation database but limited to Co. Leitram and Co. Roscommon is available at


Shamrock FlagOrdnance Survey Ireland Maps of 1895

    • Sharper farmland maps may be purchased from Ordnance Survey Ireland (OSI) which is Ireland’s National Mapping Agency. It has historical interactive maps for online selection, purchase and downloading as well as professional maps and tourist maps. Unlike Griffith, they lack a cross-reference index of farmer names to map locations.
    • OSI website is Use the OSI free map viewer to locate, zoom in and move about the OSI map.
    • The Historic 25″ map is suggested for genealogy purposes and may be purchased and downloaded in .PDF format. It displays farmland borders and lists its acreage. (Examples: I-123 is 1,123 acres; -634 is 0.634 acres.) However, Griffith and OSI farmland borders differ, possibly because of family splitting into smaller plots.