We study the subjective well being (SWB) of single mothers from 1972 to 2008 using data from the General Social Survey. While past literature has examined the outcomes of single mothers, an investigation of SWB is warranted, since it has been shown that there are potentially large slippages between economic indicators and SWB. Our results indicate that (i) single mothers report being significantly less happy than non-single-mothers, and (ii) this "happiness gap" shrank between 1972 and 2008.