This chapter provides detail description of sonography of abdomen: Urinary tract. Chapter has 92 well illustrated diagrams and pictures. Renal hypoplasia, simple ectopia, crossed renal ectopia, horseshoe kidneys, duplication anomalies, uterovesical junction obstruction, congenital hydronephrosis, renal cystic disease, acute pyelonephritis, renal abscess, tuberculosis kidney, acute glomerulonephritis, nephrolithiasis, renal tumors, bladder diverticula, bladder infection, neurogenic bladder, bladder neoplasm, bladder clot on ultrasound of urinary tract are described in detail with the help of excellent ultrasonographic illustrations and pictures. 39 references are given at the end of the chapter for further reading.