Broxbourne is a town in Hertfordshire, England, 17.1 miles (27.5 km) north-east of London, with a population of 15,303 at the 2011 Census.

About a mile (1.6 km) north of Wormley and south of Hoddesdon, the town is near the River Lea, which forms the boundary with Essex, and 4.5 miles (7.2 km) north of the M25 motorway. To the west of the town are Broxbourne Woods, a national nature reserve.

The Prime Meridian runs just east of Broxbourne.

The name is believed to derive from the Old English words brocc and burna meaning Badger stream.

Broxbourne grew up on the Great Cambridge Road, now known as the A10. A number of old houses and inns dating from the 16th to the 19th century still line the High Street (now the A1170). The Hertfordshire Golf and Country Club is a 16th Century house with later alterations and additions.

The Manor of Broxbourne has an entry in the Domesday Book as Brochtsborne, where Broxbourne Mill is listed. The manor was held in the time of Edward the Confessor by Stigand, the Archbishop of Canterbury, but had passed into Norman hands following the Conquest. King John granted the manor to the Knights Hospitallers until the Dissolution, when it passed to John Cock, after whose family Cock Lane is named.

The parish church of St Augustine was entirely rebuilt in the 15th century, although a 12th-century Purbeck marble font survives. The interior has a number of monuments and brasses dating from the 15th to the 19th century. The three stage tower has a belfry with a peal of eight bells, three of which are dated 1615.

The New River which passes through the centre of the town, was constructed in the early 17th century. Broxbourne railway station was built in 1840. A terra cotta works was opened soon afterwards by James Pulham and Son, who specialised in creating artificial rock garden features; some of their work survives in the gardens at Sandringham House and Buckingham Palace.

Pulham House was demolished in 1957. All that remained was one of the six brick kilns and the horse-drawn puddling wheel that ground the terracotta, which are now Grade II listed. The local council originally conserved these in 1986, and in 2016 full conservation was undertaken as part of a joint project between B3Living, Lowewood Museum and Broxbourne Borough Council, with support from the Heritage Lottery Fund.

The area was exploited for its gravel and sand extraction in the twentieth century leaving numerous water-filled lakes. Several of the lakes form part of the Lee Valley Regional Park.

As part of the London 2012 Summer Olympics, Spitalbrook was chosen as the venue for whitewater canoe and kayak slalom events. On 8 October 2007 the Olympic Delivery Authority (ODA) announced that due to contamination risks at the planned Spitalbrook site, an alternative site six miles (10 km) south was being investigated. Subsequently, on 16 April 2008 it was announced that the venue would be built at nearby Waltham Cross and situated on what was (at the time of the relevant press release) the overflow car park for the showground at the River Lee Country Park. The venue was initially known as Broxbourne White Water Canoe Centre and later officially named Lee Valley White Water Centre.