The objective of this study is to examine the sociodemographic factors contributing to the readmission to a drug rehabilitation center among drug addicts in Brunei Darussalam. This retrospective study used de-identified data obtained from the Al-Islah Rehabilitation Center for the period 1 January 2010 to 31 December 2017. Univariate and multiple logistic regression analyses with a stepwise variable selection method were used to estimate and determine significant factors associated with readmission to the center. A total of 92 out of 705 subjects (13%) were readmitted to the rehabilitation center within the study period, with ages ranging from 20 to 59 years (M = 36.1, SD = 8.6 years). Multiple logistic regression found that subjects who were in the age group of 40 to 49 (OR = 2.24, 95% CI [1.16, 4.37]) resided in the Belait district (OR = 1.94, 95% CI [1.00, 3.63]), divorced or widowed (OR = 2.14, 95% CI [1.19, 3.82]), had committed other criminal offenses (OR = 1.91, 95% CI [1.16, 3.11]), and voluntarily admitted (OR = 2.33, 95% CI [1.34, 4.01]), were found to be significantly more likely to get readmitted to the rehabilitation center. This study provides evidence of sociodemographic factors in relation to readmission to the rehabilitation center in Brunei Darussalam.