As an air sign, Libra is very compatible with the other air signs, Aquarius and Gemini, and also makes a great match with other Libras. Air and fire signs are also quite compatible, meaning Libra is also a good fit with Leo and Sagittarius
Libra rates high in compatibility of love, sex and communication with each of these four other signs. Although Aries is also a fire sign, they are not quite as compatible with Libras due to the fact that these signs are opposites on the Zodiac chart. Libras and Capricorns can also make a good love match. The pair rate highly in terms of communication, while also being decently compatible in both love and sex.
The sign that is least compatible with Libra is probably Cancer. This relationship rates low in all three categories of compatibility. This doesn't mean that relationships between Libras and Cancers can't work, but they do usually require hard work and patience in order for them to succeed. This also goes for relationships between Libras and all earth or water signs, but none more so than with Cancers. Libras also rate low in love compatibility with Virgos, but slightly higher in sex and communication.