They include women and children, merchant marines and civilian contract workers who never went home. Some of those buried here are unknown.
"Baby boy Theodore, Haitian refugee, " declares one grave marker at the sun-spackled grounds of the Navy-run Cuzco Beach Cemetery, on a remote corner of this isolated base.
Another marks the last resting spot of Antonia Negron Valle, who died in 1928 at age 29, and her unnamed child.
The Miami Herald was allowed a rare visit inside the cemetery, not far from a 19th-century Spanish-American War beachhead - and it reflects a different image of Guantánamo than that of terrorism suspects held captive or U.S. Marines standing guard.
At first glance, this place seems a miniature of Arlington National Cemetery, America's hallowed graveyard overlooking the Potomac River outside Washington.
But few of the 300-plus people interred here were Americans, and fewer still were members of the U.S. military.
The oldest grave here dates to 1906, three years after the base was formally established.
The most recent arrival was Edgar Lewis, an elderly Cuban citizen, who stayed to work on the base amid U.S.-Cuban tensions in the 1960s, and never went home. He died on the base late last year.
There's also a turn-of-the-20th-century U.S. sailor, William King, who was born in May 1884 and died April 22, 1906 - eight years after the Marines landed here in the Spanish-American War.
And there's Gertrude Myers Russell, whose headstone says she was a civilian employee here. She died Nov. 19, 1922, at age 29.
A walk through the cemetery - off the beaten path, behind a no-go security zone - tells a story much different from that of the Pentagon's four-year-old prison camp for suspected terrorists, which has catapulted this base to international controversy.
There are no war-on-terror prisoners buried here, nor are there any recent fallen American service members, who by policy and practice return home to U.S. soil.
Rather, one section of the cemetery recalls the huge 1990s rafter crisis when upward of 45,000 Haitian and Cuban boat people fled political crises in their homelands. The Cubans were given sanctuary in tent-camps here - until the Clinton administration renegotiated its Cuban migration policy with Havana. Haitians waited out a political crisis in their country and most were ultimately repatriated.
"Unknown Haitian Refugee, " declares a grave marker, engraved with a Christian cross. It has no age and no name of the person who died - only a poignant passing date: July 4, 1994.
The cemetery, which reflects a blend of nationalities, is the military's crisp answer to the civilian burial plots that were once scattered around this 45-square-mile outpost in southeast Cuba. That's because the military undertook a consolidation mission in the 1940s. It reinterred remains from different sites overlooking the Caribbean as well as on a site once called McCalla Hill, not far from the Pentagon's present Military Commissions Building - where 10 enemy combatants so far face war-crimes charges.
Today the base is an isolated outpost, a high-security zone where air and seacraft come and go through a delicate coordination between the U.S. military and its Cuban counterparts.
And the cemetery is cut off from the main portion of the base. It is miles from the McDonald's, out of view of the war-crimes court and open to base personnel here for commemoration ceremonies once a year, on Memorial Day.