| Zip Code : | 53089 |
| City : | Hartland village, Merton village, Sussex village |
| County : | Waukesha County |
| State : | Wisconsin (WI) |
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| Land Area : | 27.23 sq mi |
| Water Area : | 0.28 sq mi |
| Latitude : | 43.1446151 |
| Longitude : | -88.2337720 |
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| Population (2010): | 18,568 |
| Population Estimate (2012) : | 18,080 |
| Population Density : | 681.77/sq mi |
| Housing Units (2012) : | 7,251 |
| Median Household Income (2012) : | $78,113 (Wisconsin : $52,627, USA : $53,046) |
| Median Family Income (2012) : | $90,458 (Wisconsin : $66,415, USA : $64,585) |
| Median House Price (2012) : | $270,000 (Wisconsin : $169,000, USA : $181,400) |