| Official Name: | Kaštelir |
| Other Name: | Castellier |
| Settlement Type: | Village |
| Pushpin Map: | Croatia |
| Pushpin Label Position: | bottom |
| Coordinates: | 45.3031°N 13.685°W |
| Subdivision Type: | Country |
| Subdivision Type1: | County |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Kaštelir-Labinci |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 1.0 |
| Population As Of: | 2021 |
| Population Total: | 305 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Timezone Dst: | CEST |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 52464 Kaštelir |
| Area Code: | 052 |
Kaštelir (it|Castellier) is a village in Kaštelir-Labinci municipality in Istria County, Croatia.
According to the 2021 census, its population was 305. It was 329 in 2011.