Old Bolingbroke shown within Lincolnshire
|OS grid reference|
|– London||115 mi (185 km) S|
|Sovereign state||United Kingdom|
|EU Parliament||East Midlands|
|UK Parliament||Louth and Horncastle|
|Website||Bolingbroke Parish Council|
William de Roumare, Earl of Lincoln (born circa 1096), built Old Bolingbroke Castle in the 12th century as a motte and bailey castle with wet ditch. In the early 13th century a new castle was constructed at the present site by Ranulph de Blondeville, 4th Earl of Chester. Later John of Gaunt, the son of Edward III, acquired the castle. In 1367 it was the birthplace of John's son, Henry, known as Henry Bolingbroke, who became King Henry IV of England. The castle was under siege in 1643 during the Civil War when the Royalists used it to garrison troops prior to the Battle of Winceby (11 October 1643). The last remaining structure fell down in 1815. The site became a grassy hillock, which archeologists excavated in the 1970s. 
The village sits in a broad valley of the Lincolnshire Wolds, between two streams, that rise in the surrounding hills. These eventually become what is known to the south as Hagnaby Beck. The village is at about 25m above sea level.
To the North West the land rises to the 105m on Horncastle Hill, where the parish boundary falls at the highest point in the parish, if not quite the summit of the hill. To the north west the road called Spilsby Hill climbs to a separate high point at Highfield Farm. Between these two the narrow Sow Dale leads down to the village, where another Knoll called Knoll Hill stands. Sow Dale is the largest of the narrow valleys that cut through the Spilsby Sandstone ridge that forms the high plateau above the village. The traditional grazed landscape is now represented by two nature reserves only. Only the Lower one is in the parish, the upper one is adjacent to the boundary.
Another hill to the south east more high ground forms Keal Hill and Hall Hill where the parish boundary is drawn. So there is another small dale leading down into the village from the east. To the southwest another hill known as Kirkby Hill is topped with an former windmillthat sits just within the parish boundary.
The high portions of the parish are composed of the Spilsby Sandstone, which overlays here the deeper Kimmeridge and Ampthill mudstones. Eroded by the streams in the Dales, the Sandstones are removed, exposing in part the mudstone layer, although in general these are covered in the village and the river valley to the south-west by the Quaternary post-glacial sands and gravels of the Bain Valley formation.
The parish boundary is complex, but can be summarised as surrounding the village, which is broadly central, and enclosing the rising ground in all directions. It generally does not include the plateau above the village. No major roads cross the parish, but the village is joined by minor roads to many surrounding settlements. There are, and were, no railway connections.
The Parish Council own and maintain the King George V Playing Field and the Ramsden Village Hall, the latter named for John & Eleanor Ramsden who bequeathed the land used for both to the village in 1937.
The mobile library visits for an hour a month.
The ecclesiastical parish of Old Bolingbroke is part of the Spilsby, Marden Hill, Stickney & Partney Group Parishes of the Deanery of Bolingbroke. The parish church is dedicated to Saint Peter and Saint Paul.
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