The paper looks at the life situation of Czech and Slovak seniors between 2005 and 2016. The aim is to analyze data from the national standardized surveys (EU-SILC) and, based on the analyzed data, describe living conditions (an objectively measured standard of living and poverty rate) and subjective life satisfaction with an emphasis on seniors living in single-person households. The results show a large increase in the number of single-person households. The analysis of Czech households' income situation showed that the per-member monthly income for the whole population was similar to the average per-member income in households of seniors, while the group of the elderly living in single-person households appeared to be the most vulnerable one in terms of income. The differences between the seniors' incomes and expenditures indicated that about 40% of this data segment's members lived near the poverty line, while the most endangered segment members were seniors from single-person households.