Kontur population data

https://data.humdata.org/dataset/kontur-population-dataset

We are building the ultimate publicly available global population dataset by obtaining and processing all available data and fixing all known issues.

It was initially developed as a fundamental part of Disaster Ninja to help Humanitarian OpenStreetMap Team take actions confidently based on data correlated with population density.

Global Population dataset. Vector H3 hexagons with population counts at 400m resolution.

• Per-country subsets of Kontur Population can be found here: data.humdata.org/organization/kontur
• 3km resolution version: data.humdata.org/dataset/kontur-population-dataset-3km
• 22km resolution version: data.humdata.org/dataset/kontur-population-dataset-22km

via this nice population density map of Maine on reddit