Swimming at the 2011 Pan American Games – Women's 400 metre freestyle
The women's 400 metre freestyle competition of the swimming events at the 2011 Pan American Games took place on October 17 at the Scotiabank Aquatics Center in the municipality of Zapopan, near Guadalajara, Mexico. The defending Pan American Games champion was Jessica Rodriquez of the United States. This race consisted of eight lengths of the pool, all lengths being in freestyle. Records. Prior to this competition, the existing world and Pan American Games records were as follows: Qualification. Each National Olympic Committee (NOC) was able to enter  up to two entrants providing they had met the A standard (4:19.9) in the qualifying period (January 1, 2010 to September 4, 2011). NOCs were also permitted to enter one athlete providing they had met the B standard (4:27.7) in the same qualifying period. Results. All times are in minutes and seconds. Heats. The first round was held on October 17. B Final. The B final was also held on October 17. A Final. The A final was also held on October 17.