Green’s Dictionary of Slang

(US) the USA, as opposed to foreign countries; thus attrib., of or pertaining to the USA.

1944		R. Sherrod Tarawa 59: Hell, no, I want a stateside ticket.
1953		‘William Lee’ Junkie (1966) 122: They are half the strength of a two-dollar Stateside cap.
1967		A. Diment Dolly Dolly Spy 80: She was tall and slim, as most of those Stateside career women are.
1971		T. Whitmore Memphis-Nam-Sweden 127: He was stateside and I was dicked!
1976		(con. 1969) C.R. Anderson Grunts 26: They were headed for the fantasyland of the Big PX, the World, Man – Stateside!
1996		T. Wolff ‘Casualty’ in The Night in Question 15: One by one B.D’s friends rotated stateside.
2004		Hartford Courant (CT) 22 Nov. 28/3: The project is one of several [...] to reach out to Stateside Puerto Ricans.
2015		Great Falls Trib. (MT) 16 Aug. A7/4: The next grant cycle for stateside funds is in November.