Originally, the parish had an area of 2,271 acres (919 hectares), which included a detached part to the north of 588 acres (238 hectares), separated from the main part of the parish by a long, narrow exclave of Walthamstow, known as the Walthamstow Slip.

The lords and their courts appointed public officers such as constables (from 1381), marsh haywards, ale tasters (from 1509), headboroughs (from 1578), tithingmen (from 1584) and a poundkeeper in 1796.

The work house was closed in 1836, Leyton having joined, along with neighbouring parishes, the West Ham Poor Law Union.

The Union built a new work house in Leyton to serve the whole area in 1839–41, the building eventually becoming Langthorne Hospital.

The parish authorities resisted earlier attempts to form a local board of health, but finally adopted the Public Health Act 1872 for the parish of Leyton and Walthamstow Slip, creating a local government district in 1873.

[5] The board of the new district met in the vestry room until 1882, when new public offices were built in Leyton High Road to the design of J Knight.

[3] A town hall was built for the urban district in 1895-96 next to the 1882 offices, which had proved to be too small and were converted into a public library.

Designed by John Johnson (died 1920), Leyton Town Hall was described by Nikolaus Pevsner as "Fussy but enjoyable, in an eclectic and enriched Italianate style".

The crest was: "On a Wreath Or and Gules a Lion rampant per pale Or and Sable supporting a Crozier Gold".