LEAST BIASED
These sources have minimal bias and use very few loaded words (wording that attempts to influence an audience by appeals to emotion or stereotypes). The reporting is factual and usually sourced. These are the most credible media sources. See all Least Biased Sources.
- Overall, we rate the Glengariff Group as Least Biased based on polling that minimally favors the left. We also rate them as Mostly Factual pollsters based on a C+ rating in predictive polling.
Detailed Report
Bias Rating: LEAST BIASED (-1.4)
Factual Reporting: MOSTLY FACTUAL (4.0)
Country: USA
MBFC’s Country Freedom Rating: MOSTLY FREE
Media Type: Organization/Foundation
Traffic/Popularity: Minimal Traffic
MBFC Credibility Rating: MEDIUM CREDIBILITY
History
The Glengariff Group is a research organization based in Lansing, Michigan. According to their about page, “The Glengariff Group, Inc. is a full service research firm providing survey research, focus group research, dial test research, and one-on-one interviewing.”
Read our profile on the United States media and government.
Funded by / Ownership
Glengariff Group is a private company with revenue derived from service sales.
Analysis / Bias
Glengariff Group conducts political research and polling on issues affecting Michigan and the USA via various mediums. The website does not publish news or readily publish its client list.
Polling bias is assessed using Silver Bulletin’s mean-reverted bias metric. For Glengariff, the mean-reverted polling bias is −0.84, indicating a slight Democratic lean. Under MBFC’s calibrated polling bias scale, a mean bias between -0.6 and -1.0 corresponds to a polling bias score of -2. Polling bias accounts for 70% of the final bias score, while editorial bias accounts for 30%.
Applying MBFC’s weighted formula:
(−2 × 0.70) + (−0 × 0.30) = −1.4
Based on MBFC’s bias classification scale, a final score of -1.4 places Glengariff Group in the Least Biased category.
Factual reporting is rated Mostly Factual based on a Silver Bulletin grade of B-, indicating average predictive accuracy and reasonable methodological performance.
Failed Fact Checks
- None in the Last 5 years
Overall, we rate the Glengariff Group as Least Biased based on polling that minimally favors the left. We also rate them as Mostly Factual pollsters based on a C+ rating in predictive polling. (D. Van Zandt 09/16/2024) Updated (02/17/2026)
Source: https://glengariff.com/
Last Updated on February 17, 2026 by Media Bias Fact Check
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Left vs. Right Bias: How we rate the bias of media sources