The objective of this research was to evaluate the current state of urban water supply and water loss within the distribution system of Jigjiga town. The focus is specifically on assessing the water supply coverage and distribution efficiency in. water CAD software was used statistical analysis, and to generate a distribution coverage map using ArcGIS software. To calibrate the hydraulic model, field test data including flow measurements, static pressure gauges, elevation, and coordinates of sampled points were collected. The hydraulic model was calibrated by adjusting hydraulic-wall (H-W) coefficients (C) to match the minimum and maximum roughness values. Nineteen junctions from various pressure zones across the town's network were selected for data collection. Measurements were taken during average and maximum hourly demand periods between July 20th and 24th, 2015. The hydraulic system was simulated for both a single period (steady state) and an extended period. The existing water supply situation was characterized by the distribution of different service modes: house connections accounted for 18%, yard connections for 41%, and public taps for 41% of the total. The average per capita consumption was found to be 37.5 liters per capita per day, while the average level of connection per family was 0.52 connections per family. This indicates that approximately 52% or 1.97 families shared a single water connection. Water loss was analyzed at both the sampled kebele (neighborhood) and town levels, using methods such as percentage of loss and loss per number of connections. Currently, on average, 28.33% of the produced water is lost from the system at the town level due to various factors, including pressure effects, aging pipes, and inadequate maintenance. Parameters such as pressure and velocity were evaluated for both minimum and peak hour consumption scenarios. The minimum hour model was run at 1:00 AM, while the peak hour model was run at 7:00 AM from the start. Calibration was performed within acceptable pressure levels, and all field test measurements were found to be within ±2m, meeting the criteria for acceptable pressure calibration as defined by Walski et al. (2003). Therefore, the hydraulic model is considered valid. KEY WORDS: Water Distribution System, Hydraulic Performance, Water Audit, Jigjigs.