| Yeomanry Cavalry | ||
| 1794: | Northamptonshire Yeomanry Cavalry │ |
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| 1828: | disbanded |
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| 1830: | independent troops │ |
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| │ | Formation of the Volunteer Force | |
| │ | ||
| 1860: | │ │ │ |
1st Northamptonshire Mounted Rifle Volunteer Corps │ |
| 1862: | │ │ │ │ |
attached to 1st Administrative Battalion of Northamptonshire Rifle Volunteers │ |
| 1869: | │ │ |
disbanded |
| 1873: | disbanded |
|
| Raised in the Imperial Yeomanry | ||
| 1902: | The Northamptonshire Imperial Yeomanry |
|
 │ |
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| Creation of the Territorial Force | ||
| │ | ||
| 1908: | The Northamptonshire Yeomanry (TF) |
|
 │ |
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| 1914/ 1918: |
1/1st, 2/1st and 3/1st Northamptonshire Yeomanry │ |
|
| Creation of the Territorial Army | ||
| │ | ||
| 1921: | The Northamptonshire Yeomanry (TA) │ |
|
| 1922: | 7th (Northamptonshire) Armoured Car Company, The Tank Corps │ |
|
| 1923: | 25th (Northamptonshire Yeomanry) Armoured Car Company, The Royal Tank Corps │ |
|
| 1939: | The Northamptonshire Yeomanry (TA)
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 |
 |
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| 1939: | 1st Northamptonshire Yeomanry (TA) |
2nd Northamptonshire Yeomanry (TA) |
 │ |
 │ |
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| Resurrection of the Territorial Army | ||
| │ | │ | |
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| 1947: | The Northamptonshire Yeomanry (TA) │ |
|
| 1956: | reduced to | |
| D (Northamptonshire Yeomanry) Squadron, The Inns of Court Regiment |
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