Abstract. The present study reports the psychometric properties of the English version of the short form of the Attitudes Toward Homosexuality Scale (ATHS; Falomir-Pichastor & Mugny, 2009 ). Workers from Amazon’s MTurk TM ( n = 235 for validation, n = 60 for test-retest) completed the short form of the ATHS, translated from French, and the Attitudes Toward Lesbians and Gay Men Scale (ATLG; Herek, 1998) and responded to a series of demographic questions. In this paper, we present evidence for a single-factor structure of the scale, along with evidence for the validity, internal consistency, and test-retest reliability of the measure. The data revealed distinct patterns in participants’ ATHS scores as a function of their religious affiliation and political conservatism. Finally, positive ATHS scores predicted support for gay rights over and above that predicted by ATLG scores ( Herek, 1984). The evidence presented suggests that the ATHS is a psychometrically reliable and valid tool for assessing attitudes toward homosexuality.