| Diamondhead Lake, Iowa | |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Iowa#USA |
| Pushpin Label: | Diamondhead Lake |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Iowa |
| Subdivision Type2: | County |
| Subdivision Name2: | Guthrie |
| Subdivision Type3: | Township |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 2.93 |
| Area Land Km2: | 2.52 |
| Area Water Km2: | 0.41 |
| Population As Of: | 2020 |
| Population Total: | 371 |
| Population Density Km2: | 147.23 |
| Timezone: | Central (CST) |
| Elevation Ft: | 973 |
| Coordinates: | 41.5517°N -94.2617°W |
| Postal Code Type: | ZIP code |
| Blank Name: | FIPS code |
| Blank Info: | 19-21320 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2631654 |
| Area Total Sq Mi: | 1.13 |
| Area Land Sq Mi: | 0.97 |
| Area Water Sq Mi: | 0.16 |
| Population Density Sq Mi: | 381.29 |
Diamondhead Lake is an unincorporated community and census-designated place in Penn Township, Guthrie County, Iowa, United States. As of the 2010 census the population was 366.[2]
The CDP consists of a residential community that surrounds Diamondhead Lake, an artificial impoundment just south of the South Raccoon River. The community is located in the southeast corner of Guthrie County, 4miles northwest of Dexter and 6miles northeast of Stuart. It is west of Des Moines.
According to the U.S. Census Bureau, the CDP has a total area of 2sqkm, of which 1.6sqkm are land and 0.4sqkm, or 20.31%, are the waters of Diamondhead Lake.