A paper associated with the dataset has been published at: https://doi.org/10.1609/icwsm.v19i1.35940

UKTwitNewsCor is a comprehensive dataset for understanding the content production, dissemination, and audience engagement dynamics of online local media in the UK. It comprises over 2.5 million online news articles from 360 local outlets, collected from 2020 to 2022. The corpus represents all articles shared from the X (then Twitter) accounts of these outlets and were sourced from over 4.7 million tweets from these accounts during the same period. We provide social media performance metrics for the articles and further augment the dataset by adding metadata on content duplication across domains and information about the geographic coverage targeted by each domain. We supplement the article dataset with directories of domains, of district, and of publishers, within which we supply statistics about the coverage extent of UKTwitNewsCor respective to the online local media sector in the UK at the time of data collection (January 2023) to facilitate quick analyses of the local media ecosystem as well as purposive sampling of the articles.