| Official Name: | Captree, New York |
| Settlement Type: | Census-designated place |
| Pushpin Map: | New York#USA |
| Pushpin Label: | Captree |
| Pushpin Label Position: | right |
| Coordinates: | 40.64°N -73.2581°W |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | New York |
| Subdivision Type2: | County |
| Subdivision Name2: | Suffolk |
| Subdivision Type3: | Towns |
| Subdivision Name3: | Islip Babylon |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 2.80 |
| Area Land Sq Mi: | 1.62 |
| Area Water Sq Mi: | 1.18 |
| Area Total Km2: | 7.24 |
| Area Land Km2: | 4.19 |
| Area Water Km2: | 3.05 |
| Population As Of: | 2020 |
| Population Density Km2: | 11.46 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 5 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 11702 |
| Area Code: | 631 / 934 |
| Blank Name: | FIPS code |
| Blank Info: | 36-12402 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2805097 |
| Population Total: | 48 |
| Unit Pref: | Imperial |
| Population Density Sq Mi: | 29.68 |
Captree is a census-designated place (CDP) in the towns of Islip and Babylon in Suffolk County, New York, United States. It occupies Captree Island in Great South Bay, as well as the east end of Jones Beach Island to the south, comprising Captree State Park. It was first listed as a CDP prior to the 2020 census. Prior to that it was part of the Oak Beach–Captree CDP.
The community is in southwestern Suffolk County, on two islands that lie between Long Island to the north and Fire Island to the south. The eastern two-thirds of the CDP are in the town of Islip, while the one-third of the CDP that occupies the portion of Captree Island west of the Robert Moses Causeway is in the town of Babylon. The Robert Moses Causeway connects Captree and Jones Beach islands with West Islip, 6miles to the north on Long Island. Ocean Parkway runs west from Captree through Oak Beach and Gilgo, leading to Jones Beach State Park. To the south, the Fire Island Inlet Bridge leads to Robert Moses State Park on Fire Island.