| Official Name: | Lake Ka-ho, Illinois |
| Settlement Type: | Village |
| Pushpin Map: | Illinois#USA |
| Pushpin Label: | Lake Ka-ho |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Macoupin |
| Subdivision Type3: | Township |
| Subdivision Name3: | Cahokia |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 0.84 |
| Area Land Km2: | 0.73 |
| Area Water Km2: | 0.10 |
| Area Total Sq Mi: | 0.32 |
| Area Land Sq Mi: | 0.28 |
| Area Water Sq Mi: | 0.04 |
| Population As Of: | 2020 |
| Population Footnotes: | [2] |
| Population Total: | 194 |
| Population Density Km2: | 264.20 |
| Population Density Sq Mi: | 683.10 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 650 |
| Coordinates: | 39.1158°N -90.1236°W |
| Postal Code Type: | ZIP Code |
| Postal Code: | 62069 (Mount Olive) |
| Area Code: | 217 |
| Blank Name: | FIPS code |
| Blank Info: | 17-41214 |
Lake Ka-ho is a village in Cahokia Township, Macoupin County, Illinois, United States. It was incorporated in 2000. The population was 194 at the 2020 census,[2] down from 237 in 2010.[3]
The village is part of the St. Louis, MO - IL Metropolitan Statistical Area.
The village is in southeastern Macoupin County, surrounding Lake Ka-Ho, a reservoir built on a tributary of Panther Creek. It is just south of Mount Olive Lake, a reservoir built on Panther Creek. The reservoirs are in the watershed of Cahokia Creek, which flows west-southwest to the Mississippi River near St. Louis.
Lake Ka-Ho is 2miles northwest of Mount Olive and 6miles southeast of Gillespie. Interstate 55 passes just southeast of the village limits, with access from Exit 44 west of Mount Olive.
According to the U.S. Census Bureau, the village has a total area of 0.32sqmi, of which 0.28sqmi are land and 0.04sqmi, or 12.35%, are water.[1]