The current study examined how state anxiety is related to social support (formal and informal), work–family conflict, and level of happiness among married mothers and single mothers by choice (SMBC) during the first lockdown of the Covid-19 crisis. The uniqueness of the present study lies in its comparison of married mothers and SMBC, whereas previous studies examined differences between single mothers, who are usually divorced, and married mothers. Moreover, the present research is the first to combine all relevant variables in one coherent study. A sample of 386 SMBC and 293 married mothers filled out a closed online questionnaire sent through social networks. The study findings show negative correlations between the level of social support, level of happiness, and type of support (friends, family, and significant others) and the level of state anxiety. Most women did not turn to formal sources of support such as aid and welfare agencies. Finally, a positive correlation was found between state anxiety and work–family conflict.