At the end of World War II, a total of 78,750 Americans were listed as Missing In Action (MIA)
with roughly half in Pacific. During the Korean War, over 8,000 Americans were listed as Missing In Action.
The recovery and identification America's MIAs began during the war by American and Allied forces. Postwar, the MIA search and identification was tasked to the American Graves Registration Service (AGRS). Today, the Department of Defense (DoD) agency responsible for MIA recovery and identification is the Defense POW/MIA Accounting Agency (DPAA). Every year, new discoveries and reports are
made about remains and wreckage that often lead to sites being discovered and MIA cases resolved. Due to ongoing accounting efforts by the DoD, the number of Americans that are MIA is being reduced as more individuals are officially accounted for.
According to the Department of Defense (DoD) as of November 6, 2015 there were 73,515 Americans listed as Missing In Action (MIA) from World War II (including 48,103 WWII dead in the Pacific Theatre). There are 7,832 Americans listed as Missing In Action (MIA) from the Korean War [Source: DPAA - Past Conflicts].
As of September 21, 2018 there are more than 82,000 Americans Missing In Action (MIA). This includes 72,818 from World War II (including 47,681 in the Pacific), 7,680 from the Korean War, 126 from the Cold War (111 in Asia and 15 in Europe), 1,594 from the Vietnam War, 5 from the Gulf Wars and 1 from Operation El Dorado Canyon in Libya.
In the United States, the 3rd Friday in September is National POW/MIA Recognition Day.
CSPAN "House Armed Service Hearing on POW/MIA recovery and accounting" April 2, 2009
DoD Missing In Action March 2009 (74,791 Missing from World War II, with nation breakdown, 8,050 Missing from the Korean War)
DPAA (DPAA) National POW/MIA Recognition Day
Defense POW/MIA Accounting Agency (DPAA) - Past Conflicts