Forty-three female and 44 male, sexually mature normal African sand rats (Mystromys albicaudatus) provided serum and urine for determining normal ranges of selected serum chemistry and electrolyte determinations and for routine nonfasted urinalyses. Serum chloride and serum glucose levels were greater and serum sodium levels lower for female rats. An unusually high physiological level of urine protein was detected, and it was determined that standard dipstick methods for determining urine protein levels in this species gave artificially high results. Ketouria and glycosuria were more common in males than in females, but these determinations were not correlated to blood urea nitrogen or to serum glucose levels. No association was found between body weight and any of the serum chemistry, electrolyte or urinalysis variables examined.