| Official Name: | Highland Lake, New York |
| Pushpin Map: | New York#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | New York |
| Subdivision Type2: | County |
| Subdivision Name2: | Sullivan |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 1332 |
| Coordinates: | 41.5233°N -74.8514°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 12743 |
| Area Code: | 845 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 952786 |
Highland Lake is a hamlet in Sullivan County, New York, United States. The community is southwest of Monticello. Highland Lake has a post office with ZIP code 12743, which opened on June 18, 1897.[1] [2]
The lake is at an elevation of 408m / 1339 feet[3] and covers a surface area of 198.3 acres (80.3 hectares).[4] The maximum depth is approx 21 ft.[5]
Since 2012, there have been no confirmed toxic algal blooms, although there was a suspicious bloom in 2019 (page 22 of 25).[6]