This is a tracking category. It is used to build and maintain lists of pages—primarily for the sake of the lists themselves and their use in article and category maintenance. It is not part of the encyclopedia's categorization scheme. More information: This category is hidden on its member pages—unless the corresponding user preference (Appearance → Show hidden categories) is set. These categories are used to track, build and organize lists of pages needing "attention en masse" (for example, pages using deprecated syntax), or that may need to be edited at someone's earliest convenience. These categories also serve to aggregate members of several lists or sub-categories into a larger, more efficient list (discriminated by classifications). Typically, tracking categories are automatically populated by templates invoked in pages or by the MediaWiki software (see Special:TrackingCategories for an overview of the latter).

Administrators: Please do not delete this category as empty! This category may be empty occasionally or even most of the time.

This category tracks articles using {{ US Census population}} that have one of two slightly different conditions:

1. A value for |estimate= but no value for |2020=. The best way to fix this problem is to insert a value for the 2020 population of the place listed in the template. US Census QuickFacts provides a fast search box; look for the line labeled "Population, Census, April 1, 2020". If the estimate in the template is dated prior to 2020, remove it or replace it with a post-2020 estimate.
2. A value for |2020= along with a (stale) pre-2020 value for |estyear=. In those cases, since the |2020= value supersedes the estimate, the pre-2020 estimate should be removed, or replaced with a post-2020 estimate.

It is acceptable for places, such as places that are no longer inhabited or listed in the US Census, to lack a 2020 population value as long as they do not have a population estimate. The final value in the table should be the final official US Census population value.

To exclude an article from this category because it is no longer a census-designated place in the US Census (the Census instructions call this a "deleted" place, e.g. ghost towns, merged towns, deorganized places), add |deleted=yes to this template in the article.