Los Angeles International Airport (LAX) served 17.85 million passengers in 2013, overtaking its previous record of 17.48 million passengers in 2005.
Traffic for 2013 was 4.1% higher than the 17.15 million passenger traffic recorded in 2012.
International passenger traffic, which represented 26.7% of the total passenger volume, increased 4.7% to 66.66 million, compared to 63.68 million in 2012.
Los Angeles World Airports (LAWA) executive director Gina Marie Lindsey said: "The record international passenger activity at LAX is attributable to an improving worldwide economy, especially in the Asia-Pacific region, and to a modest strengthening of the Southern California economy."
"In addition, US and overseas airlines are starting or expanding international service at LAX as a result of our on-going, multi-billion-dollar LAX Modernization Program, which is complemented by major airlines investing hundreds of millions of dollars to renovate their respective domestic terminals."
Air mail decreased 12.6% to 77,286 tonnes from 88,438 in 2012.
The number of aircraft operations (landings and takeoffs) rose 1.6% to 614,917 in 2013 from 605,480 in 2012.
Los Angeles International Airport, located in Los Angeles, California, US, is the primary airport serving the Greater Los Angeles Area and is owned and operated by Los Angeles World Airports, an agency of the Los Angeles city government.