65+ research-backed statistics about relationship happiness and satisfaction. What predicts success, satisfaction levels, and more. Updated January 2026.
Interactive research-backed charts
General satisfaction levels in relationships.
Research-backed factors that predict happy relationships.
How relationship happiness changes over years.
Common factors that decrease relationship happiness.
Demographic factors and relationship satisfaction.
About 64% of couples describe their relationship as happy. Around 42% of married couples report being "very satisfied" and another 27% report being "pretty happy."
Research shows key predictors include: maintaining a 5:1 ratio of positive to negative interactions, sharing core values, spending 2.5+ hours of quality time daily, and expressing appreciation regularly.
Marital satisfaction follows a U-shaped curve: highest early on, dipping around 8-10 years (during peak parenting), then rising again after children leave. About 70% of couples married 20+ years report being very happy.
The biggest satisfaction killers are: contempt (#1 divorce predictor), phone snubbing (46% lower satisfaction), financial stress (35% lower), and unequal household labor (28% lower).
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