Editing Mason, Illinois (section)

==Geography==
Mason is located in southern Effingham County. [[Illinois Route 37]] passes through the town, leading northeast {{convert|6|mi|0}} to [[Watson, Illinois|Watson]] and southwest {{convert|3|mi|0}} to [[Edgewood, Illinois|Edgewood]]. [[Interstate 57]] crosses the northwest corner of Mason, but the closest access is from Edgewood to the southwest or from Exit 151 {{convert|4|mi|0}} to the northeast. Via I-57 it is {{convert|14|mi}} north to [[Effingham, Illinois|Effingham]], the [[county seat]], and {{convert|55|mi}} southwest to [[Mount Vernon, Illinois|Mount Vernon]].

According to the 2021 census gazetteer files, Mason has a total area of {{convert|1.29|sqmi|km2|2}}, of which {{convert|1.29|sqmi|km2|2}} (or 99.61%) is land and {{convert|0.01|sqmi|km2|2}} (or 0.39%) is water.<ref name="gaz2021">{{Cite web |publisher=United States Census Bureau |title=Gazetteer Files |url=https://www.census.gov/geographies/reference-files/time-series/geo/gazetteer-files.html |access-date=June 29, 2022 |website=Census.gov}}</ref>