<p>Loneliness is a complex construct of subjective feelings of disconnection from others. Loneliness is a significant concern among young adults in South Korea, associated with rising rates of mental illness, social isolation, and suicide. The De Jong-Gierveld Loneliness Scale (DJG scale) assesses two latent factors: social and emotional loneliness. The validation of the scale remains limited for Korean populations. This study examined the psychometric properties of the 6-item DJG short scale for college adults in Korea. We utilized survey data from college students (age range from 18 to 30) in Korea (<i>N</i> = 1,080). We conducted a confirmatory factor analysis (CFA) to evaluate the factor structure, internal consistency, and concurrent validity of the DJG scale. The CFA supported a two-factor structure and a revised five-item model after removing one item from the emotional loneliness subscale: χ²(4) = 9.46, <i>p</i> =.051, RMSEA = 0.04, CFI = 1.00, TLI = 0.999, SRMR = 0.01. The DJG scale demonstrated good internal consistency reliability (Cronbach’s α = 0.77 overall; α = 0.91 for social loneliness; α = 0.66 for emotional loneliness). Also, the findings supported concurrent validity by significant correlations with self-rated health and mental health. This study confirms that the DJG short scale is a reliable and valid measure for college adults in Korea. Our discussion highlights the importance of contextual understanding in the adoption of measurement tools to improve their accuracy and cultural relevance.</p>