All data are rounded down, which is why a value of 50% indicates a Democrat win.

Below is a chart that shows the probability distribution of the Democrats' head-to-head vote share in based on pollsters that are well-rated by 538 since the Sept 10 presidential debate. Vertical black lines indicate a roughly 95% confidence interval.

Polling Data

Credit to 538 for their incredibly generous sharing of aggregate 2024 polling data.
Pollster Poll Date Pollster Rating Popular Vote Head to Head
AtlasIntel Oct 12 - 17
Harris47.4%
Trump49.9%
Harris48.7%
Trump51.3%
AtlasIntel Oct 12 - 17
Harris46.5%
Trump49.8%
Harris48.3%
Trump51.7%
Siena/NYT Oct 07 - 10
Harris49%
Trump45%
Harris52.1%
Trump47.9%
Siena/NYT Oct 07 - 10
Harris50%
Trump47%
Harris51.5%
Trump48.5%
Siena/NYT Oct 07 - 10
Harris49%
Trump45%
Harris52.1%
Trump47.9%
Siena/NYT Oct 07 - 10
Harris50%
Trump47%
Harris51.5%
Trump48.5%
University of Massachusetts Lowell/YouGov Oct 02 - 09
Harris46%
Trump45%
Harris50.5%
Trump49.5%
Emerson Oct 05 - 08
Harris49%
Trump49.7%
Harris49.6%
Trump50.4%
Quinnipiac Oct 03 - 07
Harris49%
Trump47%
Harris51.0%
Trump49.0%
Research Co. Oct 05 - 07
Harris50%
Trump49%
Harris50.5%
Trump49.5%
Quinnipiac Oct 03 - 07
Harris49%
Trump46%
Harris51.6%
Trump48.4%
YouGov/Center for Working Class Politics Sep 24 - Oct 02
Harris46.8%
Trump44.7%
Harris51.1%
Trump48.9%
Emerson Sep 27 - 28
Harris49.3%
Trump48.8%
Harris50.3%
Trump49.7%
AtlasIntel Sep 20 - 25
Harris48%
Trump50.6%
Harris48.7%
Trump51.3%
AtlasIntel Sep 20 - 25
Harris48.1%
Trump51%
Harris48.5%
Trump51.5%
Beacon/Shaw Sep 20 - 24
Harris48%
Trump46%
Harris51.1%
Trump48.9%
Beacon/Shaw Sep 20 - 24
Harris49%
Trump49%
Harris50.0%
Trump50.0%
Beacon/Shaw Sep 20 - 24
Harris47%
Trump48%
Harris49.5%
Trump50.5%
Beacon/Shaw Sep 20 - 24
Harris50%
Trump48%
Harris51.0%
Trump49.0%
Susquehanna Sep 16 - 22
Harris46%
Trump46%
Harris50.0%
Trump50.0%
RMG Research Sep 18 - 20
Harris49%
Trump49%
Harris50.0%
Trump50.0%
Remington Sep 16 - 20
Harris47%
Trump48%
Harris49.5%
Trump50.5%
Muhlenberg Sep 16 - 19
Harris48%
Trump48%
Harris50.0%
Trump50.0%
University of Massachusetts Lowell/YouGov Sep 11 - 19
Harris48%
Trump46%
Harris51.1%
Trump48.9%
MassINC Polling Group Sep 12 - 18
Harris52%
Trump47%
Harris52.5%
Trump47.5%
Emerson Sep 15 - 18
Harris49.6%
Trump49.3%
Harris50.2%
Trump49.8%
MassINC Polling Group Sep 12 - 18
Harris50%
Trump46%
Harris52.1%
Trump47.9%
Marist Sep 12 - 17
Harris49%
Trump48%
Harris50.5%
Trump49.5%
Marist Sep 12 - 17
Harris49%
Trump49%
Harris50.0%
Trump50.0%
Siena/NYT Sep 11 - 16
Harris50%
Trump46%
Harris52.1%
Trump47.9%
Quinnipiac Sep 12 - 16
Harris51%
Trump46%
Harris52.6%
Trump47.4%
Siena/NYT Sep 11 - 16
Harris49%
Trump45%
Harris52.1%
Trump47.9%
Siena/NYT Sep 11 - 16
Harris48%
Trump45%
Harris51.6%
Trump48.4%
Siena/NYT Sep 11 - 16
Harris50%
Trump46%
Harris52.1%
Trump47.9%
The Washington Post Sep 12 - 16
Harris48%
Trump47%
Harris50.5%
Trump49.5%
The Washington Post Sep 12 - 16
Harris48%
Trump48%
Harris50.0%
Trump50.0%
Quinnipiac Sep 12 - 16
Harris51%
Trump45%
Harris53.1%
Trump46.9%
Suffolk Sep 11 - 14
Harris48.6%
Trump45.6%
Harris51.6%
Trump48.4%