St. Ann Highlands, Colorado
Census Designated Place
Location of the St. Ann Highlands CDP in Boulder County, Colorado
St. Ann Highlands Location of the St. Ann Highlands CDP in the United States
Coordinates: 39°59′14″N 105°27′21″W / 39.98722°N 105.45583°W / 39.98722; -105.45583 (St. Ann Highlands CDP, Colorado)[1]
Country	United States
State	Colorado
County	Boulder County
Government [1]
• Type	unincorporated community
Area [2]
• Total	3.602 km2 (1.391 sq mi)
• Land	3.602 km2 (1.391 sq mi)
• Water	0.000 km2 (0.000 sq mi)
Elevation [1]	2,525 m (8,285 ft)
Population  (2020)[3]
• Total	325
• Density	90/km2 (230/sq mi)
Time zone	UTC-7 (MST)
• Summer (DST)	UTC-6 (MDT)
ZIP Code[4]	Nederland 80466
Area codes	303 & 720
GNIS feature ID	2583290[1]

St. Ann Highlands or Saint Ann Highlands^[1] is an unincorporated community and a census-designated place (CDP) located in and governed by Boulder County, Colorado, United States. The CDP is a part of the Boulder, CO Metropolitan Statistical Area. The population of the St. Ann Highlands CDP was 325 at the United States Census 2020.^[3] The Nederland post office (Zip Code 80466) serves the area.^[4]

St. Ann Highlands is located in southern Boulder County, 4 miles (6 km) northeast of the town of Nederland. It occupies a ridge between the valleys of North Boulder Creek and Middle Boulder Creek. State Highway 119 forms the southern edge of the CDP, connecting Nederland to the west with Boulder 12 miles (19 km) to the east.

The St. Ann Highlands CDP has an area of 890 acres (3.602 km²), all land.^[2]

The United States Census Bureau initially defined the St. Ann Highlands CDP for the United States Census 2010.

• Boulder, CO Metropolitan Statistical Area

• Boulder County website