CACI International Inc. (originally California Analysis Center, Inc., then Consolidated Analysis Center, Inc.) is an American multinational professional services and information technology company headquartered in Northern Virginia. CACI provides services to many branches of the US federal government including defense, homeland security, intelligence, and healthcare.

CACI has approximately 23,000 employees worldwide.

CACI is a member of the Fortune 1000 Largest Companies, the Russell 2000 index, and the S&P MidCap 400 Index.

CACI was founded by Herb Karr and Harry Markowitz, who left RAND Corporation in 1962 to commercialize the SIMSCRIPT simulation programming language. The company went public in 1968. "CACI", which was originally an acronym for "California Analysis Center, Incorporated", was changed to stand for "Consolidated Analysis Center, Incorporated" in 1967. In 1973, the acronym alone was adopted as the firm's official name; reflecting the name customers had grown familiar with.

Their CACI Limited (UK) subsidiary was founded in 1975.

In February 2020, CACI announced the hiring of former White House staffer Daniel Walsh as corporate strategic adviser and senior vice president.

In April 2022, CACI announced that it had been awarded the Gold Edison Award, for its critical data dark web analysis intelligence platform DarkBlue.

CACI's growth has been predominantly via acquisitions of other IT companies.