The UCLA Loneliness Scale is a 20-item measure developed by Russell, Peplau, and Ferguson (1978) to assess feelings of loneliness and social isolation. It mixes positively and negatively worded items about connection. Source: Russell et al., 1978 (DOI).
How to use it: Answer about how you have felt lately, honestly. Higher scores mean more loneliness.
Reading your score: The bands range from low to high loneliness. They describe perceived social connection, not a diagnosis.
Limitations: This is a self-report screening tool, not a diagnosis. Loneliness is common and is one signal among many.
When to seek help: If loneliness feels heavy or long-lasting, reaching out to people you trust or a mental health professional can help. If you ever feel you might harm yourself, contact 988 (US) right away.
Related: Our WHO-5 Well-Being Index and Mental Health Help (US).