| Official Name: | Alexander, Illinois |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Illinois#USA |
| Pushpin Label: | Alexander |
| Pushpin Label Position: | left |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Morgan |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 2.55 |
| Area Land Km2: | 2.55 |
| Area Water Km2: | 0.00 |
| Area Total Sq Mi: | 0.98 |
| Area Land Sq Mi: | 0.98 |
| Area Water Sq Mi: | 0.00 |
| Population As Of: | 2020 |
| Population Footnotes: | [2] |
| Population Total: | 155 |
| Population Density Km2: | 60.83 |
| Population Density Sq Mi: | 157.52 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 659 |
| Coordinates: | 39.7217°N -90.0369°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 62601 |
| Area Code: | 217 |
| Blank Name: | FIPS code |
| Blank Info: | 17-00659 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2804093 |
Alexander is an unincorporated community and census-designated place (CDP) in Morgan County, Illinois, United States. Alexander is 10miles east of Jacksonville, the county seat, and has a post office with ZIP code 62601.[3] As of the 2020 census, it had a population of 155.[2]
Alexander was laid out in the 1850s by John T. Alexander, and named for him.[4] A post office has been in operation at Alexander since 1857.[5] The community was made a CDP prior to the 2020 census.
Alexander first appeared as a census designated place in the 2020 U.S. Census.[6]