We all have noticed the impact of COVID -19, a pandemic on nearly every aspects of our life activities. It has also affected adversely the education process going on in Educational Institutions in terms of teacher's teaching and students' learning. During COVID -19, the face to face education has been replaced by online education. The pandemic period has increased the level of Anxiety among the teachers, guardians and students too. This has caused depression and stress among them while dealing with online education. This miserable situation was also influencing on the academic -achievement of the learners. Under this impression the present investigation has been performed to examine the Impact of Anxiety, due to COVID -19, on the academic -achievement of students of class -XI of Dehradun area of Uttarakhand State in India. The sample constituted of the boys and girls belonging to urban and rural locality. A standardized tool was used for measuring Anxiety level of students whereas the scores of X class were treated as Academic -Achievement of respective students. It has been reported that owing to the COVID -19 1. The online class has remarkably increased the intensity of Anxiety among the students particularly in -------------the males than to females -------------urban students than to rural students. 2. The Anxiety has made significantly impact on the academic-achievement of students, learning through online classes, irrespective of gender (M/F) and locality (Urban/Rural).