PUBLISHED Mar. 25, 2021, at 10:00 AM

FiveThirtyEight’s Pollster Ratings

Based on the historical accuracy and methodology of each polling organization’s polls.

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University of California, Berkeley

Pollsters with a relatively small number of polls now receive a provisional rating rather than a precise letter grade.
B/C
Polls analyzed4
Races called correctly100%
Most recent cycle2020
Affiliated with professional polling organization (NCPP/AAPOR/Roper)Yes

How accurate are the polls from University of California, Berkeley?

Polls conducted within 21 days of an election (based on the poll’s median date) are used to determine the pollster’s grade.

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