What is Mamdani's approval rating?

Siena's poll conducted from 3 to 6 August 2026 found 69 percent of its New York City subgroup viewed Mamdani favorably, 24 percent viewed him unfavorably and 8 percent did not know or had no opinion.

Across the full statewide likely voter sample, Mamdani was viewed favorably by 47 percent and unfavorably by 44 percent, with 9 percent unsure or offering no opinion.

The city figure is a subgroup within a poll of 811 likely New York State voters. It is not a standalone survey of 811 New York City residents, and the uncertainty for a subgroup is larger than for the full sample.

Siena asked whether voters had a favorable or unfavorable opinion of Mamdani. That measures personal standing, not whether respondents approve of his performance as mayor.

The first hundred days Marist poll asked a job performance question and reported 48 percent approval, 30 percent disapproval and 23 percent unsure among New York City residents. The two figures should not be presented as the same measure.

Siena's June poll put Mamdani at 58 percent favorable and 26 percent unfavorable within its New York City subgroup. The August result is 11 points higher on favorable opinion and 2 points lower on unfavorable opinion.

That is a meaningful positive movement in Siena's series, but each poll is a sample rather than a census. It should be read with field dates, question wording, sample design and margin of error.

A strong favorability rating does not prove that every policy is working. The governing record still depends on rent policy, buses, childcare, housing, public safety, cost of living, budget choices and the quality of city services.

The useful test is whether positive public opinion lasts as promises move from announcements into delivery and measurable results.