AL 3

St Albans is a non-metropolitan district in Hertfordshire, England, known for its city and borough status and being the largest settlement in the district.

Childwickbury is a small hamlet in Hertfordshire, located north of St Albans within the parish of St Michael.

Flamstead is a village and civil parish in north‑west Hertfordshire, situated near the junction of the A5 and the M1 motorway at junction 9. It offers a rural setting while remaining close to the cathedral city of St Albans.

Gorhambury is part of the historic town of St Albans, known for its Roman heritage and cathedral city status. The area offers a mix of traditional character and proximity to larger urban amenities.

Markyate lies within the City of St Albans, a historic borough in Hertfordshire known for its heritage and well‑maintained streets. The area offers a mix of traditional homes and newer developments, making it appealing for families and professionals.

Redbourn is a village and civil parish in Hertfordshire, with a population of 6,913 (2011 Census). It lies within easy reach of nearby towns such as Harpenden, St Albans and Hemel Hempstead.

Sandridge is a village and civil parish in Hertfordshire, situated between the city centre of St Albans and Wheathampstead. It forms part of the contiguous built‑up area of St Albans, offering a rural feel with easy access to urban amenities.

Sandridgebury, St. Albans offers a quiet residential setting within the AL 3 postal district, with a notable local institution – St Albans Girls' School – providing a secondary education option for families.