Publicly available statistical data on the residents of Rockhaven during its more than fifty years in operation is limited.  Federal census takers noted that most of the information about residents was provided by nursing staff.

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However, based on census data, some preliminary conclusions can be drawn.

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In 1930, the average resident age was 60. Forty-four residents lived at Rockhaven.  The oldest resident was 86, and the youngest was 23.

In 1940, the average age was 63. One hundred and nine residents lived there.  The oldest resident was 90, and the youngest was 22.

In 1950, the average age was 67.  Eighty-two residents lived there.  The oldest resident was 101 and the youngest was 17.