Ordnance Survey maps
Survey and revision dates for County Series mapping - Ireland, 1829-1952
- Dates in green with (p) indicate a partial revision of the county, with only some maps published.
View Scotland County Series mapping dates.
View England and Wales County Series mapping dates.
| County | County Survey | 1st revision | 2nd revision | 3rd revision |
|---|---|---|---|---|
| Antrim | 1829-33 | 1853-58 (p) | 1900-6 | 1920-22; 1931-7; 1945-46; 1950-1 |
| Armagh | 1835 | 1863-64 | 1905-09 | 1948-57 (p); 1952-4 (p) |
| Carlow | 1839 | 1873-74 | 1905-06 | 1938-39 (p) |
| Cavan | 1835-36 | 1876-80 | 1908-11 | |
| Clare | 1840-42 | 1893-97 | 1913-18 (p) | 1938 (p) & 1951-52 (p) |
| Cork | 1841-42 | 1897-1904 | 1926-37 (p) | |
| Derry | 1830-32 | 1849-53 (p) | 1904-6 | 1924/39-50 (p) |
| Donegal | 1834-36 | 1848 (p) | 1900-5 | 1948-54 (p) |
| Down | 1835 | 1862-63 | 1899-1904 | 1925/1938-9 (p) |
| Dublin | 1843 | 1871-75 | 1906-09 | 1935-38 |
| Fermanagh | 1835 | 1860-1 | 1905-7 | |
| Galway | 1838-39 | 1890-98 | 1915-20 (p) | 1925-34 (p); 1944-48 (p) |
| Kerry | 1841-42 | 1894-98 (p) | 1914-15 (p) | 1937-38 (p) |
| Kildare | 1837-38 | 1870-72 | 1907-09 | 1939 (p) |
| Kilkenny | 1839-40 | 1899-1902 | 1945-48 (p) | |
| Laois (Queen's County) | 1838-41 | 1888-91 | 1906-07 (p) | |
| Leitrim | 1835-36 | 1882-87 | 1907-09 (p) | 1943-45 (p) |
| Limerick | 1840-41 | 1897-03 | 1918-24 (p) | 1937-38 (p) |
| Londonderry | 1830-33 | tbc | tbc | |
| Longford | 1836-37 | 1879-81 | 1911 (p) | |
| Louth | 1835 | 1861-64 | 1907-09 (p) | 1938-39 (p) |
| Mayo | 1837-39 | 1893-00 | 1913-17 (p) | 1923-25 (p) |
| Meath | 1836 | 1882-84 | 1907-11 (p) | 1958 (p) |
| Monaghan | 1834-35 | 1857-59 | 1909-10 | 1947-48 (p) |
| Offaly (Kings County) | 1838 | 1884-85 | 1909-10 (p) | |
| Roscommon | 1838 | 1889-95 | 1911-13 | 1923-25 (p) |
| Sligo | 1837 | 1885-88 | 1909-12 (p) | 1940-41 (p) |
| Tipperary | 1839-41 | 1901-02 (p) | 1938/1950-4 (p) | |
| Tyrone | 1832-34 | 1857-59 (p) | 1905-06 (p) | 1935-39/1950-53 (p) |
| Waterford | 1839-41 | 1897-05 | 1922-23 (p) | 1950 (p) |
| Westmeath | 1837 | 1874-76 | 1911-13 (p) | 1952-53 (p) |
| Wexford | 1839-40 | 1902-05 | 1921 (p) | 1939-41 (p) |
| Wicklow | 1838 | 1885-87 | 1908-09 | 1937 (p) |