The Pennsylvania State Data Center used the Census preliminary 2020 data to create an interactive dashboard showing municipal population change from 2010 to 2020. This dashboard if for all of PA. You can filter on York County by scrolling to the bottom of the dashboard and select York County from the pick list. From there you can review the municipal population change along with some limited demographic statistics. The link to the dashboard is below.
https://pasdc.hbg.psu.edu/Data/PaSDC-Dashboards/Census-2020-Municipal-Data
For more information on 2020 Census, visit our webpage https://www.ycpc.org/304/2020-Census.