Maryland was ranked the second-happiest state in the U.S., partly due to its low unemployment rate and high household income, according to a WalletHub study.

The study listed Hawaii as the first happiest state, and Nebraska as the third happiest.

Quantifying happiness

The study defined happiness by determining which environmental factors are linked to a person's well-being. According to the study, economic, emotional, physical and social health are key to a fulfilling life.

"The happiest states are those that provide above-average quality of life in a wide variety of areas, from strong state economies and high-quality physical and mental health care to adequate amounts of leisure time and good weather," said WalletHub Analyst Chip Lupo.

Maryland's happiness factors

The study found

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