| Official Name: | Hartje |
| Pushpin Map: | Croatia |
| Pushpin Label Position: | bottom |
| Coordinates: | 45.7567°N 15.4527°W |
| Subdivision Type: | Country |
| Subdivision Type1: | County |
| Subdivision Name1: | Zagreb County |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Žumberak |
| Area Footnotes: | [1] |
| Area Total Km2: | 1.5 |
| Population As Of: | 2021 |
| Population Total: | 27 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Timezone Dst: | CEST |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal code |
Hartje is a naselje (settlement) in the municipality of Žumberak, Zagreb County, Croatia. According to the 2011 census, it has 34 inhabitants. The family of Zagreb bishop Petar Petretić from the 17th century originates from Hartje. According to the data from the topography, in 1835 the village had 12 houses and 86 Catholic inhabitants. [2]