The present study aimed to explore the lexical processing abilities of bilingual school-aged children compared to their monolingual peers. Therefore, word form processing tasks (auditory lexical decision, rapid naming, rhyming), as well as traditional vocabulary tasks (word-picture matching and picture naming), were conducted in a cross-sectional design in a sample of 163 German monolingual and 39 bilingual primary school children (6-9 years), speaking German and another language. Regression analyses revealed that age, gender, and vocabulary size, but not bilingualism have an impact on performance in word form processing tasks. Group comparisons after propensity matching on age, gender, and vocabulary size revealed no significant group differences between monolingual and bilingual children in word form processing tasks. After the sample was divided into two age groups, bilingual children showed an initial weakness at ages 6 to 7 that seems to be overcome during primary school age.