The present study assessed the population parameters and stock status of common carp (Cyprinus carpio) from the Ottu reservoir, Haryana, India using length-frequency data of 716 fish samples analysed through the FISAT-II software package. The asymptotic length (L∞) and growth coefficient (K) were 369.43 mm and 0.72 year-1, respectively with a growth performance index (φ′) of 4.99 indicating moderate growth. Natural mortality (M), fishing mortality (F), and total mortality (Z) rates were 1.1 year⁻¹, 1.73 year⁻¹ and 1.84 year⁻¹ respectively. Recruitment pattern indicates a single annual recruitment with a major peak during August-September. It was observed that the likelihood of capture at L25, L50, and L75 was 271.26, 296.15 and 307.71 mm, respectively with length at first capture (Lc) estimated at 296.15 mm. The relative yield per recruit (Y΄/R) and biomass per recruit (B΄/R) were 0.80 and 1.01, respectively. The exploitation (E) rate was estimated at 0.63, which indicated the fish was overexploited (E> 0.50) in the Ottu reservoir. These results indicate that in order to effectively utilization of C. carpio in Ottu reservoir, suitable fisheries management methods like limiting fishing effort and mesh size regulation are required.