Apathetic

having or showing little or no emotion:
apathetic behavior.
not interested or concerned; indifferent or unresponsive:
an apathetic audience.
Contemporary Examples

But is privacy for public figures good for a place as apathetic as L.A.?
Mate the Press Joe Mathews June 10, 2009

“[The sheriff’s] attitude was apathetic, unconcerned and uninterested from the start,” adds Sutton.
The Malibu Murder Mystery Christine Pelisek November 4, 2010

“The song was awkward for Marxist critics because of its apathetic character,” the scholar Franz Mennemeier noted.
Brecht’s Mercenary Mother Courage Turns 75 Katie Baker September 9, 2014

At this point, my biggest aphrodisiac is an apathetic attitude toward politics.
Looking for Mr. Far Right Meghan McCain March 1, 2009

Revolution 2.0 narrates a fascinating but narrow slice of the process through which apathetic and passive people are politicized.
‘Revolution 2.0’ and ‘Liberation Square’ Reviewed Thanassis Cambanis January 17, 2012

Historical Examples

Gillane was apathetic, but when Stannard measured out the tea he joked and Deering laughed.
Northwest! Harold Bindloss

Walter shot a hard look at his apathetic sister, then turned to his father.
Alice Adams Booth Tarkington

Parliament itself is dull, the public is apathetic, and everything appertaining to politics is flat and unprofitable.
The Confessions of a Caricaturist, Vol. 1 (of 2) Harry Furniss

They sat in an apathetic circle, waiting for Old Jerry to come.
Once to Every Man Larry Evans

Remember also that the sympathetic (not apathetic) listener is the delight of delights.
Etiquette Emily Post

adjective
having or showing little or no emotion; indifferent
adj.

1744, from apathy + -ic, on model of pathetic.

apathetic ap·a·thet·ic (āp’ə-thět’ĭk)
adj.
Lacking interest or concern; indifferent.
ap’a·thet’i·cal·ly adv.