This paper presents the results of the determination of the degree of ripeness, fruit weight, randman and sensitivity of the investigated varieties (Oblica, Levantinka, Leccino and Lastovka) to harmful organisms. In the period from October to November 2022, fruit samples were collected from olive groves at two locations in Split - Dalmatia County (Naklice and Žrnovnica). The fruits were classified according to assortment and time of harvest. From each variety 100 fruits were selected and the tests were carried out. When determining the degree of ripeness, the fruits of each variety are classified according to the color of the skin. The variety with the highest percentage of ripe fruit in the early and late harvest period is Leccino, and the lowest is Lastovka, which applies to both olive groves. The weight of the fruits was determined with a digital scale. The oil content was determined after processing. At both locations, a higher oil yield was obtained in the late harvesting period. In both olive groves, the presence of economically important olive pests was detected: the olive fly (Bactrocera oleae) and the olive borer (Rhynchites cribripennis) as well as the presence of a fungal disease (anthracnose-Gloeosporium olivarum). Evaluation of the intensity of infection of the olive fruits was done by visual examination of the fruits. At both locations, the Oblica variety is most sensitive to infestation by the olive fly B. oleae, while the Levantinka variety is most sensitive to infestation by the olive borer R. cribipennis. The research results show that there are significant differences in the economic characteristics of the olive (fruit weight, oil yield) and sensitivity to environmental factors, confirming the importance of location as a basic agrotechnical measure when choosing a site for growing olive groves.