The purpose of this study was to investigate chewing efficiency and oral sensory and motor developmental symptoms and habits in a clinical population of 210 Swedish children between 4 to 9 years old. The children were referred to Oral Motor Centre (OMC), Danderyd Hospital in Stockholm questioning oral- and/or speech motor disorders. Comparison was made with 77 typically developing children (TD). Chewing efficiency was performed with the Hue-CheckÓ chewing gum test and analyzed with the outcome measure SDHue. Statistical analysis with multiple linear regression showed that children with oral developmental delay (OD) and motor speech disorders (MSD) chewed less efficient than the TD children. The children with OD, MSD and language disorders (PDL) also showed larger frequencies of oral sensory and motor symptoms and habits compared to the TD children. Impaired chewing and oral symptoms and habits can possibly be part of a larger symptom complex. Inability to chew efficiently can affect quality of life.