| Dates | 2 May – 15 September 1970 |
|---|---|
| Administrator | England and Wales Cricket Board |
| Cricket format | First-class cricket |
| Tournament format | League system |
| Champions | Kent (5th title) |
| Participants | 17 |
| Matches | 204 |
| Most runs | Glenn Turner, (Worcestershire) 2,346 |
| Most wickets | Don Shepherd, (Glamorgan) 101 |
The 1970 County Championship was the 71st officially organised running of the County Championship. Kent won the Championship title.
| Team | P | W | L | D | Bat | Bowl | Pts | |
|---|---|---|---|---|---|---|---|---|
| 1 | Kent | 24 | 9 | 5 | 10 | 70 | 77 | 237 |
| 2 | Glamorgan | 24 | 9 | 6 | 9 | 48 | 82 | 220 |
| 3 | Lancashire | 24 | 6 | 2 | 16 | 78 | 78 | 216 |
| 4 | Yorkshire | 24 | 8 | 5 | 11 | 49 | 86 | 215 |
| 5 | Surrey | 24 | 6 | 4 | 14 | 60 | 83 | 203 |
| 6 | Worcestershire | 24 | 7 | 1 | 16 | 46 | 84 | 200 |
| =7 | Derbyshire | 24 | 7 | 7 | 10 | 51 | 78 | 199 |
| =7 | Warwickshire | 24 | 7 | 6 | 11 | 53 | 71 | 199 |
| =7 | Sussex | 24 | 5 | 7 | 12 | 62 | 87 | 199 |
| 10 | Hampshire | 24 | 4 | 6 | 14 | 69 | 88 | 197 |
| 11 | Nottinghamshire | 24 | 4 | 8 | 12 | 71 | 73 | 184 |
| 12 | Essex | 24 | 4 | 6 | 14 | 64 | 76 | 180 |
| 13 | Somerset | 24 | 5 | 10 | 9 | 40 | 86 | 176 |
| 14 | Northamptonshire | 24 | 4 | 6 | 14 | 60 | 74 | 174 |
| 15 | Leicestershire | 24 | 5 | 6 | 13 | 46 | 77 | 173 |
| =16 | Middlesex | 24 | 5 | 5 | 14 | 47 | 69 | 166 |
| =16 | Gloucestershire | 24 | 3 | 8 | 13 | 56 | 80 | 166 |