In Ethiopia, potato (Solanum tuberosum L.) is a potential food security and cash crop due to its high productivity and nutritional quality tuber. Due to these reason Welmera district farmers cultivated potato crops to fill full food security and also as cash crop to earn income from potato for different purpose. The major potato producing areas in the highlands of Shewa include Welmera district, West Shewa (Ginchi, Jeldu, Galessa), and North Shewa. Even if it is produced, it affected by different insect pests and needed proper storage system, so a study was carried out at Welmera district to assess the insect pests associated to potato under field area and in storage condition. Data were collected from farmers and Developmental Agents of the district using random sampling and purposive sampling technique to get actual primary data. The Primary data were analyzed, interpreted and put in frequency numbers and in percentage. The main constrains of potato production in this district were includes infestation of insect pests, diseases infestation, and weeds infestation.. However, several insect pests are associated to potato which contribute to the low yield of the crop. Among the insects P. operculella, potato aphid, green peach aphid, cutworms, red ants, potato epilachna, and leafhopper were a major pre-harvest problem and P. operculella and red ants are both pre and post-harvest problem of potato in Ethiopia. These insect pests reduced farmerâ€™s production capacity by large. Harvested tubers are stored on house floor or on bed like structure located under roof, and sacks. Some farmers keep the tubers un-harvested in the field area, but un-harvested potato were exposed to different animals such as cattle, rodents, and sheep. The stored potato tubers are infested by insect pests of potato such as, P. operculela and red ants are the most serious one. In addition to these insect pests aphids are another most serious by attacking potato and transmitting different viral diseases to potato during cultivation at the field or farm area. Farmers of Welmera district must use proper way of potato storage and concerned body should give awareness to the farmers of Welmera district on how the farmers cultivate and store potato properly.