| Unit Pref: | Imperial |
| Settlement Type: | Township |
| Official Name: | Andalusia Township |
| Image Map1: | Map of Illinois highlighting Rock Island County.svg |
| Mapsize1: | 150px |
| Map Caption1: | Rock Island County's location in Illinois |
| Coordinates: | 41.4364°N -90.7211°W |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Rock Island |
| Leader Title: | Supervisor |
| Established Title: | Established |
| Established Date: | September, 1858 |
| Area Total Sq Mi: | 15.46 |
| Area Land Sq Mi: | 12.81 |
| Area Water Sq Mi: | 2.65 |
| Area Water Percent: | 17.14 |
| Population As Of: | 2010 |
| Population Density Sq Mi: | 179.5 |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Pop Est As Of: | 2016 |
| Pop Est Footnotes: | [1] |
| Population Est: | 2281 |
| Blank Name: | FIPS code |
| Blank Info: | 17-161-01439 |
Andalusia Township is located in Rock Island County, Illinois. As of the 2010 census, its population was 2,299 and it contained 920 housing units.[2] Andalusia Township was formed from Edgington Township in September, 1858.
According to the 2010 census, the township has a total area of, of which (or 82.86%) is land and (or 17.14%) is water.[2]