Great Gaddesden is located in the county of Hertfordshire, Eastern England, three miles north-west of the major town of Hemel Hempstead, and 25 miles north-west of London. Great Gaddesden lies roughly one mile south of the Bedfordshire border. Great Gaddesden falls within the district council of Dacorum, under the county council of Hertfordshire. It is in the HP1 postcode district. The post town for Great Gaddesden is Hemel Hempstead.
Great Gaddesden is in the ceremonial county of Hertfordshire, the historic county of Hertfordshire, and the administrative county of Hertfordshire.
Great Gaddesden is situated roughly centrally between the southernmost and northernmost extremities of Hertfordshire, and towards the westernmost extremity of Hertfordshire.
The nearest postcode to the centre of Great Gaddesden is HP1 3BY.
Great Gaddesden is situated towards the northernmost extremity of the HP1 postcode district, and roughly centrally between the easternmost and westernmost extremities of the HP1 postcode district.
The post town for Great Gaddesden is Hemel Hempstead. Great Gaddesden is in the HP1 postcode district, which corresponds to the post town of Hemel Hempstead.
The centre of Great Gaddesden is located at position 51.78921° latitude and -0.51278° longitude.
The centre of Great Gaddesden is located at the grid reference easting 502674 and northing 211108 within the British National Grid (OSGB36) system.
Position of Great Gaddesden relative to nearby towns. Distance is measured from the centre of Great Gaddesden to the centre of the town.
Position of Great Gaddesden relative to nearby cities. Distance is measured from the centre of Great Gaddesden to the centre of the city.