Trinity became the Bishop's Chapel at this time and from 1941 to 1945 Cathedral House became a home for servicemen during World War II.

It was designed by Earl Barnett, an architect who traveled the world and studied different houses of worship to find the right inspiration.

[citation needed] On May 2001, then-Dean Donald G. Brown joined dozens of other clergy in a famous open letter against President George W. Bush's faith-based initiative.

[5] Trinity Cathedral was in 2012 named by Peter Saucerman, a local architect, as one of the 10 most architecturally "noteworthy" churches in the city of Sacramento.

[8] In 2019, Trinity Cathedral started a tradition of two days of meal giveaways to unhoused persons for Thanksgiving.

[10] In retaliation, Florida's governor Ron DeSantis ordered a plane to fly and then bus 36 migrants, to dumped them off in front of the nearby Roman Cathedral's offices; the Episcopal Cathedral assisted with humanitarian relief in the form of clothing.