Historical Voter Turnout | NYC Open Data

Voter Turnout Highest in Half Century as Mamdani Phenomenon Galvanizes Electorate

More than 2 million New York voters cast ballots, the most in a mayoral race since 1969.

Nearly a quarter of NYC’s early voters were new Democratic primary participants

A total of 385,184 New Yorkers voted early in this primary election, compared to 191,197 in 2021.

New York City cast vote record: An initial analysis of the 2025 Democratic mayoral primary - FairVote

This post explores the New York City cast vote record released July 24 – showing how voters used their rankings in the primary.

NYPD Complaint Data Historic | NYC Open Data

A Million Doors to a Million Votes: NYC-DSA’s Plan for a Mamdani Mandate - Democratic Left

Victory in the Democratic primary has transformed what’s possible for socialists in New York City. A 10,500 member-strong NYC-DSA's road to November is paved with opportunities to expand our base and muster the forces needed to implement his agenda.

The Twilight of the Polls? A Review of Trends in Polling Accuracy and the Causes of Polling Misses

Polls have had a number of high-profile misses in recent elections. We review the current polling environment, the performance of polls in a historical context, the mechanisms of polling error, and the causes of several recent misses in Britain and the US. Contrary to conventional wisdom, polling errors have been constant over time, although the level of error has always been substantially beyond that implied by stated margins of error. Generally, there is little evidence that voters lying about their vote intention (so-called ‘shy’ voters) is a substantial cause of polling error. Instead, polling errors have most commonly resulted from problems with representative samples and weighting, undecided voters breaking in one direction, and to a lesser extent late swings and turnout models. We conclude with a discussion of future directions for polling both in terms of fixing the problems identified and new approaches to understanding public opinion.

The Effects of Canvassing, Telephone Calls, and Direct Mail on Voter Turnout: A Field Experiment.

Gerber, Alan S. & Donald P. Green (2000) “The Effects of Canvassing, Telephone Calls, and Direct Mail on Voter Turnout: A Field Experiment.” American Political Science Review 94(3):653-663.

Election polling errors across time and space

Are election polling misses becoming more prevalent? Are they more likely in some contexts than others? Here we undertake an over-time and cross-national assessment of prediction errors in pre-election polls. Our analysis draws on more than 30,000 national polls from 351 general elections in 45 countries between 1942 and 2017. We proceed in the following way. First, building on previous studies, we show how errors in national polls evolve in a structured way over the election timeline. Second, we examine errors in polls in the final week of the election campaign to assess performance across election years. Third, we undertake a pooled analysis of polling errors—controlling for a number of institutional and party features—that enables us to test whether poll errors have increased or decreased over time. We find that, contrary to conventional wisdom, the recent performance of polls has not been outside the ordinary. However, the performance of polls does vary across political contexts and in understandable ways.

Wisconsin town revolts against a Trump-backed data center project

At least four local data center-related ballot measures are set to appear on ballots this year, with the first vote coming Tuesday in Port Washington, Wisconsin.

Verifying information about elections

We can help you check the facts behind election information you receive.

An Assessment of the Causes of the Errors in the 2015 UK Gseneral Election Opinion Polls

Summary The opinion polls that were undertaken before the 2015 UK general election underestimated the Conservative lead over Labour by an average of 7 percentage points. This collective failure led politicians and commentators to question the validity and utility of political polling and raised concerns regarding a broader public loss of confidence in survey research. We assess the likely causes of the 2015 polling errors. We begin by setting out a formal account of the statistical methodology and assumptions that are required for valid estimation of party vote shares by using quota sampling. We then describe the current approach of polling organizations for estimating sampling variability and suggest a new method based on bootstrap resampling. Next, we use poll microdata to assess the plausibility of different explanations of the polling errors. Our conclusion is that the primary cause of the polling errors in 2015 was unrepresentative sampling.

Voting place map and hours | Where to vote | City of Vancouver

Find which voting places are close to your home, work, or where you're running errands.

Zohran Mamdani’s Electrifying Upset in NYC:#RankTheSlate – “Don’t Rank Cuomo” | Portside

So much ink (literal and virtual) has been spilled on the electrifying upset in the NYC mayoral primary race. Zohran Mamdani wins and Andrew Cuomo, the former disgraced NY governor, had to concede on election night. Every media outlet has weighed in from NY Times, to every substack, and every celebrity who supported Mamdani. This is not an analysis of Zohran’s mighty win but just a few observations from a New York City resident and more precisely someone living in Central Harlem.

Who voted for Zohran Mamdani?

Zohram Mamdani’s triumph over Andrew Cuomo in the New York City Democratic primary signals a shift towards the progressive wing of the party. Mamdani excelled among younger, Hispanic, and Asi…

Election Rumor Rundown for October 13: Emerging rumors around voting machines and ‘ballot dumping’

DHS reports misconstrue vulnerabilities as having been exploited, “Ballot Dumping” in Valley Center misleadingly suggest mass voter fraud, and prediction markets already advertising election bettin…