| Tamnyaskey | |
| Type: | townland |
| Translit Lang1: | Irish |
| Translit Lang1 Type: | Derivation: |
| Translit Lang1 Info: | Irish: Tamhnaigh Oscair |
| Translit Lang1 Type1: | Meaning: |
| Translit Lang1 Info1: | "Oscar's field (?)" |
| Translit Lang2 Type: | Derivation: |
| Translit Lang2 Type1: | Meaning: |
| Pushpin Map: | Northern Ireland#United Kingdom |
| Pushpin Map Caption: | Tamnyaskey shown within Northern Ireland |
| Coordinates: | 54.795°N -6.728°W |
| Subdivision Type: | Sovereign state |
| Subdivision Name: | United Kingdom |
| Subdivision Type1: | Country |
| Subdivision Name1: | Northern Ireland |
| Subdivision Type2: | County |
| Subdivision Name2: | County Londonderry |
| Subdivision Type3: | Barony |
| Subdivision Name3: | Loughinsholin |
| Subdivision Type4: | Civil parish |
| Subdivision Name4: | Kilcronaghan |
| Leader Title: | Council |
| Leader Name: | Mid Ulster District |
| Leader Title1: | Ward |
| Leader Name1: | Tobermore |
| Established Title: | Plantation grant |
| Established Date: | Church lands |
| Established Title1: | First recorded |
| Established Date1: | 1654 |
| Parts Type: | Settlements |
| Parts Style: | para |
| Area Total Ha: | 88.93 |
| Area Total Acre: | 219.75 |
| Blank Name Sec1: | Irish grid ref |
| Blank Info Sec1: | H8195 |
Tamnyaskey (pronounced as /ˌtamniˈaːski/,) is a townland lying within the civil parish of Kilcronaghan, County Londonderry, Northern Ireland. It lies in the west of the parish, and is bounded by the townlands of Brackaghlislea, Calmore, Granny, Mormeal, and Tullyroan. It wasn't apportioned to any of the London livery companies, being kept as church lands.
The townland was part of the Tobermore electoral ward of the former Magherafelt District Council, however in 1926 it was part of Tobermore district electoral division as part of the Maghera division of Magherafelt Rural District. It was also part of the historic barony of Loughinsholin.
Along with the townlands of Granny, Mormeal, and Tullyroan, Tamneyaskey comprises the four townlands that make up the Bishop of Derrys lands in the parish. Prior to the Plantation of Ulster, these four townlands constituted the termon (or erenagh) land of the parish, and were known as "Ballintrolla, Derreskerdan, Dirrygrinagh et Kellynahawla". Despite these townlands being in the same location as the later townlands, it is now impossible to match their names accurately.
| Year | Pop. | |
|---|---|---|
| 1841 | 98 | |
| 1851 | 75 | |
| 1861 | 97 | |
| 1871 | 67 | |
| 1881 | 83 | |
| 1891 | 65 | |
| 1901 | 43 | |
| 1911 | 41 | |
| 1926 | 45 | |
| Year | a, r, p | |
|---|---|---|
| 1851 | 239, 1, 14 | |
| 1881 | 237, 2, 25 | |
| 1901 | 237, 2, 25 | |
| 1926 | 228, 0, 5 |
| Year | Form | |
|---|---|---|
| 1654 | Tamneosker | |
| 1657c | Tawneosker | |
| 1659c | Tauniagher | |
| 1661 | Tawneosker | |
| 1661c | Tamlaghoskutt | |
| 1663 | Tawnaosker | |
| 1672c | Tomnasker | |
| 1672c | Townasker | |
| 1680 | Tateneosker | |
| 1767 | Tammaskey | |
| 1813 | Tamneyaskey (S.M.) | |
| (S.M.) - Sampson's Map | ||