Pollster ratings · Head to head

Ipsos vs. UMass Lowell: which pollster is more accurate?

UMass Lowell comes out ahead on 6 of 6 measures in the Crosstab Trust Index, which grades pollsters on how close their final polls came to actual results from 1998 to 2022.

 
Ipsos
B+
Trust Score 60/100 · rank #28
★ Ahead
University of Massachusetts Lowell Center for Public Opinion
A
Trust Score 80/100 · rank #5

Head to head

MeasureIpsosUMass Lowell
Trust Score60/10080/100 ★
Average error
how far final polls missed the result
4.7 pts3.4 pts ★
Versus expected
error compared with what its races predicted
0.1 worse1.5 better ★
Consistency
random miss once its tilt is removed
±4 pts±3.3 pts ★
Historical bias
closer to even is better
D+2.4D+1.6 ★
Winners called73%85% ★
Track record
final polls analyzed, 1998–2022
175 polls21 polls
2026 polls141

Compare them in the interactive Trust Index All pollster ratings

More comparisons: Ipsos vs. YouGov · University of Massachusetts Lowell Center for Public Opinion vs. YouGov · Emerson College vs. Ipsos · Emerson College vs. University of Massachusetts Lowell Center for Public Opinion · Ipsos vs. University of New Hampshire Survey Center · University of Massachusetts Lowell Center for Public Opinion vs. University of New Hampshire Survey Center · Ipsos vs. New York Times/Siena College · New York Times/Siena College vs. University of Massachusetts Lowell Center for Public Opinion

Frequently asked questions

Which is more accurate, Ipsos or UMass Lowell?

UMass Lowell has the smaller average error (3.4 pts vs. 4.7 pts). Overall, uMass Lowell comes out ahead on 6 of 6 measures in the Crosstab Trust Index (Ipsos: B+, Trust Score 60; UMass Lowell: A, Trust Score 80).

Grades: Crosstab Trust Index, computed from FiveThirtyEight's pollster-ratings data (CC BY 4.0), 1998–2022; 2026 measures from Crosstab's polling data.

Updated 2026-10-04 · Crosstab, nonpartisan polling analysis.