X0304 5 2011-12-31 false 0 0 0001275617 COHEN & STEERS INFRASTRUCTURE FUND INC UTF 0001181438 STEERS ROBERT HAMILTON 280 PARK AVENUE NEW YORK NY 10017 true true false false Co-Chairman Common Stock, par value $0.001 per share 2011-12-31 5 J false 2268 0 A 46258.9885 D Common Stock, par value $0.001 per share 2011-12-31 5 J false 120 0 A 2626.199 I In Children's Accounts Common Stock, par value $0.001 per share 2011-12-31 5 J false 120 0 A 1491.9183 I In Spouse's Account Shares were acquired through dividend reinvestments at various prices at fair market value throughout the 2011 reporting year. The reporting person disclaims beneficial ownership of the securities in the children's accounts, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose. The reporting person disclaims beneficial ownership of the securities in the spouse's account, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose. Tina M. Payne, Attorney-in-Fact 2012-02-14