Context This is a Halloween survey from data collected via Facebook, LinkedIn, Reddit, and email. Respondents were offered Amazon gift cards as random prizes. The questions include what costumes people wore, when people started/stopped trick-or-treating, a few other Halloween-related questions, and demographics. Content The responses are all (ideally, though not verified) from people who have spent most of their lives in the United States/its territories. There are responses for individuals who did and didn't celebrate Halloween, as well as those who did but never went trick-or-treating. The sample may possibly be biased in that regard, although I hope that the gift card prizes reduce that effect. The first main section is with costumes people wore. There is a checkbox grid question with 4 groups for each of 35 different costumes/costume categories. The options correspond to "Age 9 and under