Greater Manchester will elect a new mayor on 30 July 2026, after Andy Burnham vacated the role upon winning the parliamentary seat of Makerfield, according to Greater Manchester Combined Authority.

Burnham had held the mayoralty since 2017, building it into one of the most prominent sub-national executive positions in England. His move to Westminster — as MP for Makerfield — triggers a statutory vacancy that cannot be filled by appointment; the office must go to a popular vote. Candidates have been officially confirmed, per GMCA, though the full slate has not yet been published in the verified sourcing available at time of writing.

The voter registration deadline falls on 14 July 2026 — little more than three weeks before polling day. That compressed window places a premium on rapid outreach across the ten boroughs of the Combined Authority: Bolton, Bury, Manchester, Oldham, Rochdale, Salford, Stockport, Tameside, Trafford, and Wigan. Stockport Council has already published guidance for residents on registration and voting arrangements.

The Greater Manchester mayoral office carries substantial devolved authority — covering strategic transport (including Bee Network integration), spatial planning, housing investment, police and crime oversight via the GMCA's mayoral functions, and significant influence over the city-region's economic development agenda. Whoever wins on 30 July inherits a portfolio with real fiscal and operational weight, not a ceremonial brief.

The timing is worth noting plainly. A summer by-election, scheduled mid-week — a Thursday, as is standard under UK electoral law — typically sees lower turnout than a general or local election cycle. Organising parties will be running campaigns across a sprawling conurbation of roughly 2.8 million people during a period when many voters are away. Whether that suppresses participation or whether the high-profile nature of the vacancy drives engagement is an open question.

Burnham's tenure shaped expectations of what the Greater Manchester mayor can and should be: a visible, nationally vocal advocate for the city-region, willing to publicly contest central government policy on issues ranging from COVID-19 restrictions to rail devolution. That legacy sets a high bar for any successor and will likely define the terms of the campaign, regardless of party affiliation.

The 30 July date gives parties and independent candidates a tight but workable runway. With registration closing 14 July and polling eight weeks from the announcement date, the contest is short by most by-election standards. Prospective voters across Greater Manchester should verify their registration status before the mid-July cutoff to avoid disenfranchisement on what is, functionally, one of the more consequential sub-national offices in England outside London.