Raymond is enumerated in the 1870 household of James Pratt at Elmira, Chemung Co., New York. The 1870 census data follows:
James P Pratt M 42 PA
Sarah E Pratt F 32 PA
Raymond Pratt M 4 PA

Raymond is enumerated in the 1880 household of his parents at Elmira, Chemung County.

In 1888, a directory of Elmira lists R B Pratt's occupation as physician and surgeon. His office is located at the corner of Baldwin and East Market.

In 1891, a directory of Elmira lists R B Pratt's occupation as physician and surgeon. His office is located at the corner of Baldwin and East Market.

Raymond is enumerate in the 1892 NYS census at Elmira. He is age 28 years and his occupation is M.D.

Raymond is enumerated in the 1900 household of his mother at Elmira. His occupation is Physician. His marital status is Single. The 1900 census data follows:
Sarah E Pratt Head F 63 PA
Raymond B Pratt Son M 34 PA
Delphene Nygant Roomer F 70 PA

The Pratt Private Hospital and Dispensary, Elmira, was established in 1900. It had 20 beds and R. B. Pratt, physician, was in charge.

Raymond married Julia NORTON Short on 02 Feb 1902. As far as known they had no children together.

Raymond, Julia and six nurses are enumerated in the 1905 NYS census at Pratt's Institute, located on State Street, Elmira. Raymond's occupation is Physician and Julia's occupation is Housework. The 1905 census data follows:
Raymond B Pratt Head M 39y US
Julia N Pratt Wife F 31y US
Catherine Belknap Boarder F 22y US
Florence Cornell Boarder F 19y US
Martha R Anlenburg Boarder F 24y US
Lucinda Spencer Boarder F 20y US
Viola Lyon Boarder F 22y US
Bessie Runyan Boarder F 19y US
Maud Lane Niece F 14y US

In 1906, Raymond's marriage to Julia was annulled.

Raymond remarried to Florence H CORNELL, in 1907. She gave birth to at least 1 child named Raymond B Pratt Jr.

Raymond Sr died of tuberculosis, aged 42 years.