Counties · Philly suburbs
Chester County
Chester has 391,711 registered voters as of Oct 19, 2026, 4.3% of the state's roll. Democrats lead by 10,953, up from 6,033 at the November 2024 election. The scenario model groups it with 3 other counties as “Philly suburbs.”
Registered now
391,711
All parties, Oct 19, 2026
Democratic lead
10,953
D 41.5% · R 38.7% of the roll
Since Nov 2024
−4,410
−1.1% from 396,121
Inactive
7.7%
361,590 active, 30,121 inactive
Registration by party
Since Nov 2024 the Republican share here fell from 39.7% to 38.7% and the Democratic share rose from 41.2% to 41.5%.
Now (Oct 19, 2026)
- Democrats 41.5%
- Republicans 38.7%
- Other and no party 19.8%
May 2026 primary
- Democrats 41.3%
- Republicans 39.1%
- Other and no party 19.6%
Nov 2024 election
- Democrats 41.2%
- Republicans 39.7%
- Other and no party 19.1%
| When | Dem | Rep | Other | Total |
|---|---|---|---|---|
| Now (Oct 19, 2026) | 162,641 | 151,688 | 77,382 | 391,711 |
| May 2026 primary | 160,423 | 152,163 | 76,132 | 388,718 |
| Nov 2024 election | 163,289 | 157,256 | 75,576 | 396,121 |
Democrats lead by 10,953, up from 8,260 at the May primary.
Turnout, 2014–2024
In 2022, 67.5% of Chester's registered voters cast a governor vote, 7.1 points above the state. In 2024 it was 82.0%, 5.4 points above the state.
- Chester
- Statewide
Results by year
Shapiro carried Chester by 26.4 points in 2022, and Harris by 14.5 in 2024. Democrats carried it in all 6 elections.
| Election | Democrat | Votes | Republican | Votes | Other | Margin | Registered | Turnout |
|---|---|---|---|---|---|---|---|---|
| 2014 governor | Wolf | 80,701 (52%) | Corbett | 75,097 (48%) | 0 | Wolf +3.6 | 335,581 | 46.4% |
| 2016 president | Clinton | 141,682 (53%) | Trump | 116,114 (43%) | 11,004 | Clinton +9.5 | 355,432 | 75.6% |
| 2018 governor | Wolf | 145,212 (61%) | Wagner | 87,873 (37%) | 3,690 | Wolf +24.2 | 357,307 | 66.3% |
| 2020 president | Biden | 182,372 (58%) | Trump | 128,565 (41%) | 3,565 | Biden +17.1 | 380,357 | 82.7% |
| 2022 governor | Shapiro | 160,796 (62%) | Mastriano | 92,585 (36%) | 4,644 | Shapiro +26.4 | 382,333 | 67.5% |
| 2024 president | Harris | 184,281 (57%) | Trump | 137,299 (42%) | 3,384 | Harris +14.5 | 396,121 | 82.0% |
What Garrity needs here
On the smallest uniform path to a statewide tie, Garrity needs 41.1% of the ballot in Chester. That is 5.3 points more than Mastriano won in 2022, and 1.2 points below Trump's 2024 share.
Mastriano 2022
35.9%
Wagner 2018 37.1% · Corbett 2014 48.2%
Trump 2024
42.3%
Share of the presidential ballot
Tie-path target
41.1%
41.9% of the two-party vote
Gain over Mastriano
+5.3 pts
Share of the ballot
Net votes needed
+27,813
Over a 2022 replay, 3.5% of the statewide gap
In 2022 Shapiro won Chester by 68,211 votes. At the target, on about 264,354 ballots at 2022 turnout on today's roll, Garrity would still lose the county by 42,071 votes. That is 27,813 net votes better for her than a 2022 replay on the same roll.
How turnout is measured
Turnout is votes in the top race divided by registered voters. The top race is governor in 2014, 2018 and 2022 and president in 2016, 2020 and 2024. The state's returns files have no total-ballots count, so this undercounts by the roughly 1% who skip the top race.
The state's own 2024 count of people who voted in Chester is 327,523, against 324,964 presidential votes.
A turnout rate can rise because the roll shrank, not because more people voted. That did not happen to a large degree here: no four-year span saw the roll fall 5% or more while votes held within 3%. Warren is the clearest case statewide: 20,650 presidential votes in 2020 and 20,723 in 2024 on a roll that fell from 31,431 to 26,871.