To test if the apparent absorption of phosphorous (P) is reduced by aluminum (Al), iron (Fe), and manganese (Mn), relationships between the fecal contents of these minerals and the apparent digestibility (ADC) of P in dairy cows were determined. The study involved 10 commercial dairy farms in Manitoba, and 10 early and peak lactation, 10 mid lactation and 10 late lactation cows on each farm. Farms were visited once to collect diet, feed and fecal grab samples of individual cows. Feed, diet, and feces samples were analyzed by ICP for P and for the internal marker acid insoluble ash (AIA). Feces samples also were analyzed for Al, Fe, and Mn by ICP. Apparent digestibility coefficients (ADC) of P for individual cows were determined from the contents of P and AIA in the diet and the feces. Fecal Al contents of individual cows ranged from 2.7 to 36.8 ppm, with an average of 9.8 ppm (DM basis). Fecal Fe contents of individual cows ranged from 5.5 to 34.5 ppm, with an average of 11.6 ppm (DM basis). Fecal Mn contents of individual cows ranged from 0.6 to 5.6 ppm, with an average of 2.3 ppm (DM basis). These concentrations do fecal mineral contents do not indicate that the fecal Al, Fe, and Mn contents were excessive. The ADC of P ranged from 15.9 to 59.7% among individual cows with an average of 35.1%. The fecal Al and Fe contents were correlated (r = 0.60, P < 0.0001), but the fecal contents of Mn were not correlated with those of Al (P = 0.91) and Fe (P = 0.65). The regression equation between the ADC of P and the fecal contents of Al, Fe, and Mn (in ppm) determined by SAS Mixed Procedure was ADC P = 27.51(± 2.79, estimate + SE) + 1.18 (± 0.15) × Al – 1.11(± 0.19) × Fe +1.73(± 0.93) × Mn (R² = 0.31). This shows that, as expected, the increases in fecal Fe contents were associated with decreases in the ADC of P, but that for the fecal Al and Mn contents the opposite occurred. These discrepancies may be the result of the confounding of these fecal contents with other factors that affect the ADC of P and variation in the form that the dietary Al, Fe, and Mn contents were in. Nevertheless, results suggest that at the levels observed in our study the fecal contents of Al, Fe, and Mn may affect the digestibility of P.