A downspout drain collar for connecting a rain gutter downspout to a downspout attachment is provided. The collar includes a collar flange adapted to removably engage the downspout attachment. The collar includes a collar body having a top portion, a bottom portion, a transition portion connecting the top portion to the bottom portion, and an axis extending through an opening defined by the body. The collar includes at least one armature extending from the collar toward the axis when the downspout drain collar is not secured to the rain gutter downspout, with each armature configured to be moved to removably secure the downspout drain collar to the rain gutter downspout.