year,adults_living_as_couples_pct,cohabitation_rate_pct,never_married_25plus_pct,married_couple_household_pct,young_adults_18_34_married_pct,source_notes
1949,,,,78.8,,Census; peak married-couple households
1960,72,~0.1,9,,,Census; cohabitation virtually nonexistent
1965,70,~0.1,,,,Census estimate
1968,,0.1-0.2,,,,CPS; 0.1% of 18-24; 0.2% of 25-34
1970,68,~0.3,,,,Census
1975,66,~0.8,,,,Census estimate
1978,,,,,59,Census; young adults married
1980,64,~1.5,,,,Census
1985,63,~2.5,,,,Census estimate
1990,62,3.2,,,,Census; Pew
1995,61,~3.0,,,,Census estimate; cohabitation data variable
2000,60,~4.2,,,,Census
2005,59,~5.0,,,,Census
2010,58,~5.8,,,,Census
2015,57,~6.5,,,,Census; Pew
2020,56,~6.8,,,30,Census; 76% of 2015-2019 marriages preceded by cohabitation (BGSU)
2022,,,,46.8,,Census; all-time low married-couple households
2024,,,,47.1,,Census; second lowest
2025,58,7.0,~20,,~30,"Census latest; ~12% of under-30 cohabiting; 1 in 5 never married"