This study intends to examine the relationship between strength and speed in Cumhuriyet Elementary School in Samsun. The study group consists of 240 students (120 boys and 120 girls) aged 11-14 years who participated voluntarily in the study through random selection. This study investigated the relationship among the values of leg and back strength, 30-second sit-up, standing long jump, vertical jump, reaction time, and 10 m and 20 m sprint running of 5th through 8th graders. Intragroup strength and speed relationships of each class and gender were examined separately in the study. Data were analyzed through Pearson product-moment correlation coefficient in SPSS package program with a 0.05 margin of error (p < 0.05). As a result of the study, it was observed that the strength and speed increased in conjunction with the age variable and there was a significant negative correlation between 10 m and 20 m sprint running and strength values. That is, the sprint running time decreased as the strength increased. According to the results obtained in the study, it was seen that there was a significant relationship between strength and speed in school children aged 11-14 years and that speed and strength performances affected each other. However, no significant linear relationship was found between reaction time and strength.