Ordnance Survey maps
Survey and revision dates for County Series mapping - England and Wales 1842-1952
Compiled with thanks from Richard Oliver's Ordnance Survey maps: a concise guide for historians, 3rd ed. (London: Charles Close, 2013).
- Dates in red with (m) indicate that the county meridian and its sheet lines changed from this time onwards.
- Dates in green with (p) indicate a partial revision of the county, with only some maps published.
- Dates in blue with (f) indicate that the 6" to the mile maps were published on full sheets rather than quarter sheets.
View Ireland County Series mapping dates.
View Scotland County Series mapping dates.
| County | County Survey | 1st revision | 2nd revision | 3rd revision |
|---|---|---|---|---|
| Anglesey | 1886-87 | 1899 | 1913-23 | |
| Bedfordshire | 1876-82 | 1898-1900 | 1921-39 (p) | |
| Berkshire | 1866-83 (f) | 1897-99 | 1909-12 | 1919-42 (p) |
| Brecknockshire | 1874-88 | 1902-4 | 1913-27 (p) | |
| Buckinghamshire | 1867-81 (f) | 1897-99 | 1918-24 (p) | 1932-38 (p) |
| Caernarvonshire | 1885-88 | 1898-1900 | 1910-1914 | 1937-39 (p) |
| Cambridgeshire | 1876-86 | 1896-1901 | 1924-26 (p) | 1937-38 (p) |
| Cardiganshire | 1885-88 | 1900-4 | 1937-38 (p) | |
| Carmarthenshire | 1875-87 | 1903-6 | 1913-37 (p) | |
| Cheshire | 1870-75 (f) | 1896-98 | 1904-9 | 1924-37 (p) |
| Cornwall and Isles of Scilly | 1859-88 | 1905-7 | 1912-36 (p) | |
| Cumberland | 1859-65 (f) | 1897-1900 | 1922-24 (p) | |
| Denbighshire | 1870-75 (f) | 1897-99 | 1909-12 | 1937-39 (p) |
| Derbyshire | 1875-82 | 1896-1900 | 1912-21 (p) | 1937-38 (p) |
| Devon | 1855-89 | 1902-5 | 1912 (p) | 1932-39 (p) |
| Dorset | 1860-88 | 1900-1 | 1923-33 (p) | 1934-38 (p) |
| Durham | 1854-57 | 1894-97 | 1912-19 | 1937-39 (p) |
| Essex | 1862-76 (f) | 1893-6 | 1913-22 (m) | 1937-42 (p) |
| Flintshire | 1869-72 (f) | 1897-99 | 1909-11 | |
| Glamorgan | 1867-78 (f) | 1896-99 | 1913-1916 | 1935-43 (p) |
| Gloucestershire | 1873-84 | 1898-1902 | 1912-22 | 1936-39 (p) |
| Hampshire and Isle of Wight | 1856-75 (f) | 1894-97 | 1906-10 | 1922-43 (p) |
| Herefordshire | 1878-87 | 1901-4 | 1916-28 (p) | 1937 (p) |
| Hertfordshire | 1865-81 (f) | 1895-97 | 1912-23 | 1934-47 (p) |
| Huntingdonshire | 1884-87 | 1899-1901 | 1924-25 (p) | 1937 |
| Kent | 1858-73 (f) | 1893-97 | 1905-10 | 1929-40 (p) |
| Lancashire | 1842-93 (Note 1) | 1904-12 | 1915-18 (p) | 1924-35 (p) |
| Leicestershire | 1879-86 | 1899-1902 | 1912-30 (p) | 1937-39 (p) |
| Lincolnshire | 1883-88 | 1898-1906 | 1914-32 (p) | 1937-40 (p) |
| Isle of Man | 1866-69 (f) | |||
| London | 1862-72 (f) | 1891-95 | 1912-14 | 1934-37 |
| Merionethshire | 1873-88 | 1899-1900 | 1913-14 (p) | |
| Middlesex | 1862-72 (f) | 1891-95 | 1911-1913 | 1932-41 |
| Monmouthshire | 1875-85 (f) | 1898-1900 | 1915-20 | 1936-43 (p) |
| Montgomeryshire | 1874-87 | 1900-1 | 1924 | |
| Norfolk | 1879-86 | 1900-6 | 1925-27 | 1938-39 (p) |
| Northamptonshire | 1882-86 | 1898-1900 | 1919-38 (p) | 1937-38 (p) |
| Northumberland | 1855-84 | 1894-97 | 1913-23 (m) | 1936-40 (p) |
| Nottinghamshire | 1875-85 | 1897-99 | 1912-19 | 1937-40 (p) |
| Oxfordshire | 1872-80 (f) | 1897-1900 | 1910-20 (p) | 1932-39 (p) |
| Pembrokeshire | 1860-88 | 1904-6 | 1937 (p) | |
| Radnorshire | 1883-88 | 1901-4 | 1926-27 (p) | |
| Rutland | 1883-84 | 1899-1903 | 1928 (p) | |
| Shropshire | 1873-84 | 1899-1902 | 1924-26 (p) | 1937 (p) |
| Somerset | 1882-88 | 1900-3 | 1912-30 (p) | 1934-39 (p) |
| Staffordshire | 1861-1886 | 1897-1902 | 1912-23 | 1937-38 (p) |
| Suffolk | 1861-85 | 1900-4 | 1924-26 (p) | |
| Surrey | 1861-71 (f) | 1891-96 | 1910-13 | 1930-44 (p) |
| Sussex | 1869-75 | 1895-98 | 1907-10 | 1925-46 |
| Warwickshire | 1881-84 | 1898-1900 | 1912-26 (p) | 1936-39 (p) |
| Westmorland | 1856-60 (f) | 1896-98 | 1910-13 | 1938 (p) |
| Wiltshire | 1871-85 (f) | 1898-1900 | 1921-24 | 1936-43 (p) |
| Worcestershire | 1881-84 | 1898-1903 | 1913-26 (p) | 1937-38 (p) |
| Yorkshire | 1844-1893 (Note 2) | 1901-1914 | 1920-1935 (p) | 1932-38 (p) |