Demetrius I of Bactria (en), Démétrios Ier de Bactriane (fr), Demetrio I de Bactriana (es), Demetrio I di Battria (it), Demetrios I. (de), Δημήτριος Α΄ ο Ανίκητος (el)Additional labels
Деметрий I (bg), ব্যাক্ট্রিয়ার প্রথম দেমেত্রিওস (bn), Demetri I de Bactriana (ca), Démétrios I. Baktrijský (cs), Demetrio la 1-a (Baktrio) (eo), デメトリオス1世 (ja), დემეტრიოს I ბაქტრიელი (ka), 데메트리오스 1세 (ko), Деметриј I од Бактрија (mk), ബാക്ട്രിയയിലെ ഡിമിട്രിയസ് I (ml), Demetrios I (nl), Demetriusz I Baktryjski (pl), Demétrio I de Báctria (pt), Деметрий I (ru), Demetrije I od Baktrije (sh), Demetrios I av Baktrien (sv), தெமித்திரஸ் (ta), Деметрій I (uk), باختر کا ڈیمیٹریس اول (ur), Demetriy I (uz), Demetrios I của Bactria (vi), 德米特里一世 (zh)
Demetrius I was a Graeco-Bactrian king ruling in the early second century BCE. He was the son and successor of Euthydemus
I and is considered to have expanded his kingdom to the south through conquests in India