This series contains an amalgam of institutional records dating from 1958 to 2015, plus a single declined grant from 1984. There are JAHF annual reports from 1958 to 2015, as well as a run of JAHF Bulletins from 1966 to 1978. Additionally, Boxes 526 to 532 contain records on the planning, writing, and distribution of the institutional history of the foundation. This was referred to as the History Project and went through several iterations before publication of "The Greatest Good" in 1984.

The collection contains Grant Files and associated administrative records.

The collection contains grant files and associated administrative records from 1979 to 2001.

This series contains grant files from 1954 to 1999. During the late 1970s to mid-1980s, the John A. Hartford Foundation underwent a self-described transition period, during which it examined and redefined its grant-making programs. As a result, in a specialized program from 1980 to 1983, JAHF funded a limited number of grants focused on energy conservation for institutions. These grant files are located in Series 3, Boxes 313 to 318.

This series contains grant files from 1974 to 1996. It also contains files on the administration and recipients of the John A. and George L. Hartford fellowship program from 1979 to 1986 in Boxes 350 to 361.

The collection contains grant files and associated administrative records from 1992 to 2015 including but not limited to: proposals, award letters, progress reports, correspondence and budget files.

This series contains grant files from 1996 to 2014, plus a single grant from 1980 to 1985. It also contains a box of index cards that summarize the grants awarded from 1969 to 1977, first by grantee and then by project area.

The collection contains Grant Files and associated administrative records.