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Bolton

Every election cycle we have data for, most recent first.

8 cycles in our data
44.8% all-time seats elected below the quota (91 of 203)
13.3% all-time seats unfairly awarded (27 of 203 across 8 cycles)

Cycles

Council composition as of 2026

60 councillors, by party. One square per seat. Source: opencouncildata annual snapshot — reflects the council at the end of 2026 (after that year's elections, by-elections and defections). Hover any seat for the party.

Most recent election (2026)

In 2026, 20 seats were up across 20 wards. The table below shows what each party actually won — alongside what they would have won if the 20 seats had been shared in proportion to votes received (how, with caveats). The Δ column is the actual seat count minus the proportional seat count — positive numbers are parties First-Past-the-Post over-represented; negative are parties it under-represented.

PartyVotesVote %Seats won% of seatsProportional seatsProportional %Δ
Reform UK28,10532.6%945.0%735.0%+2
Labour Party16,84419.5%210.0%420.0%-2
Green Party15,21017.6%315.0%420.0%-1
Conservative Party12,43314.4%315.0%315.0%0
Liberal Democrats6,3877.4%15.0%15.0%0
Horwich & Blackrod First Independents3,6804.3%210.0%15.0%+1
Farnworth and Kearsley First Party2,7533.2%00.0%00.0%0
Independent6790.8%00.0%00.0%0
Westhoughton First Independents1000.1%00.0%00.0%0
Advance UK710.1%00.0%00.0%0
Trade Unionist and Socialist Coalition400.0%00.0%00.0%0
Total86,302100.0%20100.0%20100.0%0

Vote share vs seats won

The top bar is each party's share of votes cast in this council. Below, one square per seat, coloured by the party that won it — first the actual First-Past-the-Post result, then what a proportional method would have produced from the same vote totals. Divergence between the bar and the actual grid is the indictment of the method.

Vote share
Actual seats
Proportional seats

Full ward-by-ward results for 2026 →

Composition history

One row per opencouncildata annual snapshot — the council at the end of each year (after that year's elections, by-elections and defections). Newest first; hover any seat for the party.

2026
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016

Ward by ward

Each row is a ward, each column a cycle. Each cell shows the top-of-poll candidate's party (swatch) and their share of valid ballots. Wards are matched by name across cycles — boundary reviews can mean a ward of the same name is a slightly different area in a later cycle.

Ward20162018201920212022202320242026
Astley Bridge43%42%39%70%49%55%38%33%
Bradshaw51%57%56%69%52%53%41%37%
Breightmet36%47%40%49%49%48%42%47%
Bromley Cross57%73%63%62%56%55%46%36%
Crompton67%57%51%55%46%
Farnworth48%54%53%50%48%
Farnworth North62%33%29%
Farnworth South59%43%41%
Great Lever69%76%52%58%68%65%48%46%
Halliwell67%70%64%73%74%51%45%42%
Harper Green49%54%46%45%57%
Heaton and Lostock56%66%54%57%52%
Heaton, Lostock and Chew Moor51%44%38%
Horwich and Blackrod43%48%37%33%32%
Horwich North50%53%39%
Horwich North East41%36%38%35%38%
Horwich South and Blackrod52%48%44%
Hulton37%50%47%45%44%44%30%43%
Kearsley45%52%68%52%38%62%50%46%
Little Lever and Darcy Lever39%37%39%43%38%45%38%50%
Queens Park and Central74%44%35%
Rumworth72%76%73%64%55%54%48%50%
Smithills51%49%52%44%51%58%46%38%
Tonge with the Haulgh46%50%42%45%45%59%45%47%
Westhoughton North and Chew Moor39%43%39%47%43%
Westhoughton North and Hunger Hill37%34%38%
Westhoughton South33%53%33%36%33%39%35%37%