Peter Johnson Gulick (March 12, 1796 – December 8, 1877) was a missionary to the Kingdom of Hawaii and Japan.

On September 5, 1827, he married Frances "Fanny" Hinckley Thomas who was born April 16, 1798, in Lebanon, Connecticut.

On November 3, 1827, the couple sailed from Boston as part of the third company of missionaries from the American Board of Commissioners for Foreign Missions.

In 1835 they moved to Kōloa on Kauaʻi, where the Kōloa sugar plantation had just been started by Ladd & Co. After the Ladd company failed in 1843, they moved to the island of Molokaʻi where they assisted Harvey Rexford Hitchcock and his wife Rebecca Howard Hitchcock.

[22] Since Julia had not yet been born when her brother Luther Halsey Gulick left for the United States in 1840, the family never was all together in the same place at one time.