Lake Ronkonkoma is a hamlet and census-designated place (CDP) in Suffolk County, on Long Island, in New York, United States.

This can undergo significant changes over time, and the lake level experiences slow periods of rise and fall.

The lake is the subject of a number of urban legends, mainly rooted in the area's rich Native American heritage.

In all versions, the lady is an Indian princess who herself drowned in the lake, for reasons that vary depending on the story.

Articles suggest that in the past 200 years, only a handful of females have drowned in Lake Ronkonkoma.

"There is a mysterious rise and fall of the lake that doesn't have any noticeable relationship to local rainfall totals."

According to the United States Census Bureau, the CDP has a total area of 4.9 square miles (13 km2), all land.

The Brookhaven town beach and park on the eastern side of Lake Ronkonkoma, has been renamed in honor of Navy SEAL Lieutenant Michael P.

[7] Lt. Murphy was head lifeguard and beach manager of this park, during high school and summer recess from college.

Lake Ronkonkoma is primarily located within the boundaries of (and is thus served by) the Sachem Central School District.

[8] However, a smaller section of Lake Ronkonkoma (also known as South Centereach) is located within the boundaries of (and is thus served by) the Middle Country Central School District.