The Odsey Hundred is one of the hundreds of Hertfordshire; one of the smaller of the county's hundreds, in the very north, up against the borders with Bedfordshire and Cambridgeshire. It is one of the least populous hundreds, with a population in 2011 of 13,275, just slightly more than that of neighbouring Edwintree Hundred.
The village of Odsey whose name supplies that of the hundred is just across the border in Cambridgeshire.
The hundred comprises the following ancient parishes:
*: Mostly in Cambridgeshire.
|Hundreds of Hertfordshire|