Sefton Council, or Sefton Metropolitan Borough Council, is the local authority of the Metropolitan Borough of Sefton in Merseyside, England. It is a metropolitan borough council and provides the majority of local government services in the borough. The council has been a member of the Liverpool City Region Combined Authority since 2014.

The council has been under Labour majority control since 2012. Full council meetings generally alternate between Bootle Town Hall and Southport Town Hall. The main administrative offices are at Magdalen House in Bootle.

The metropolitan borough of Sefton and its council were created in 1974 under the Local Government Act 1972, covering the whole area of five former districts and parts of another, all of which were abolished at the same time:

The area was transferred from Lancashire to become one of the five districts in the new metropolitan county of Merseyside. The first election to the new council was held in 1973. For its first year the council acted as a shadow authority alongside the area's outgoing authorities. The new metropolitan district and its council formally came into being on 1 April 1974, at which point the old districts and their councils were abolished.

Sefton was the only one of the 36 metropolitan boroughs created in 1974 not to be granted borough status from its creation. The shadow authority had decided against petitioning for borough status, which allows the chair of the council to take the title of mayor. It instead established charter trustees to allow the three towns of Bootle, Crosby and Southport (which each had mayors prior to the reforms) to continue to appoint separate mayors. Shortly after the new council came into effect the decision was reversed, with the council petitioning Queen Elizabeth II for borough status and abolishing the three separate town mayoralties. A charter conferring borough status on Sefton was issued in 1975. The council styles itself Sefton Council rather than its full formal name of Sefton Metropolitan Borough Council.

From 1974 until 1986 the council was a lower-tier authority, with upper-tier functions provided by Merseyside County Council. The county council was abolished in 1986 and its functions passed to Merseyside's five borough councils, including Sefton, with some services provided through joint committees.

Since 2014 the council has been a member of the Liverpool City Region Combined Authority, which has been led by the directly elected Mayor of the Liverpool City Region since 2017. The combined authority provides strategic leadership and co-ordination for certain functions across the region, but Sefton Council continues to be responsible for most local government functions.

Sefton Council provides metropolitan borough services. Some strategic functions in the area are provided by the Liverpool City Region Combined Authority; the leader of Sefton Council sits on the combined authority as Sefton's representative. Parts of the borough are covered by civil parishes, which form an additional tier of local government for their areas.