Introduction: Plantar fasciopathy is the most common cause of heel pain. It may result in physical inactivity and impact quality of life. Ultrasound can aid to rule out other heel pathology as well as to see various finding in plantar fasciopathy. Material and methods: This observational study was carried out in the outpatient department of physical medicine and rehabilitation of King George\'s Medical University, Lucknow, Uttar Pradesh, India. The time duration of the study was three months. The ethical clearance was taken. The aim of this study was to find out the association between plantar fasciitis and plantar fascia thickness. The objective of this study was to compare plantar fascia thickness of patients suffering from plantar fasciopathy and normal healthy subjects using ultrasound. Two groups were created, group A had a patient diagnosed with plantar fasciopathy while group B was a control group and had normal healthy subjects. A p value < 0.05 was taken as statistically significant. Data analysis was done using statistical package for social sciences (SPSS) software version 21. Results: Both groups were age and sex matched. The plantar fascia thickness of group A and B was 5.38 ± 0.70 mm and 2.71 ± 0.60 mm, respectively. The intergroup comparisons showed that there was a significant difference between the plantar fascia thickness of two groups with p-value < 0.001. Conclusion: The present study showed that plantar fascia thickness has a direct association with plantar fasciopathy.