| Lake Killarney | |
|---|---|
&sq=&lang=&file=File:Lake_Killarney_(WA).jpg) Aerial view of Lake Killarney, near the junction of I-5 and SR 18. Lake Geneva is located just to the northeast of Lake Killarney | |
&sq=&lang=&file=File:USA_Washington_relief_location_map.jpg)  Lake Killarney &sq=&lang=&file=File:Usa_edcp_relief_location_map.png) Lake Killarney | |
| Location | Federal Way, Washington and Lakeland South, Washington |
| Coordinates | 47°17′11″N 122°17′27″W / 47.286263°N 122.290801°W |
| Basin countries | United States |
| Surface area | 29.30 acres (11.86 ha) |
| Max. depth | 15 ft (4.6 m) |
| Surface elevation | 372 ft (113 m) |
Lake Killarney is a lake in King County, Washington. It is located on the city line of Federal Way, Washington and the Lakeland South, Washington census designated place. It is popular for recreation, with fishing opportunities and a public park. The lake has suffered from arsenic pollution. Lake Killarney is one of several lakes in Lakeland South, including Lake Geneva, Fivemile Lake, and Trout Lake.