ALBANY, N.Y. — It will be a happy New Year indeed for millions of the lowest-paid U.S. workers. Nineteen states, including New York and California, will ring in the year with an increase in the minimum wage.

Massachusetts and Washington state will have the highest new minimum wages in the country, at $11 per hour.

California will raise its wage to $10.50 for businesses with 26 or more employees. New York state is taking a regional approach, with the wage rising to $11 in New York City, $10 in its downstate suburbs and $9.70 elsewhere.

“This $1.50 increase, I cannot even comprehend or tell you how important this will be,” said Alvin Major, a New York City fast-food worker. The 51-year-old father of four helped lead the fight for the increase in his state, one of several successful efforts by fast-food workers and other low-wage workers around the country.

Voters in Arizona, Maine, Colorado and Washington approved increases in the election. Seven other states, Alaska, Florida, Missouri, Montana, New Jersey, Ohio and South Dakota, are automatically raising the wage based on indexing. Other states seeing increases are Arkansas, Connecticut, Hawaii, Michigan and Vermont.

In Arizona, the state Chamber of Commerce and Industry filed a lawsuit challenging the increase, which will raise the minimum wage from $8.05 to $10. On Thursday, the Arizona Supreme Court refused to temporarily block the raise.

Workers and labor advocates argue the increases will help low-wage workers now barely making ends meet and boost the economy by giving some consumers more money to spend. But many business owners opposed the higher wages, saying they would lead to higher prices and greater automation.

Some restaurant owners may consider reducing portion sizes or charging for side dishes that were once included in the price of a meal to absorb the increase, according to Melissa Fleischut, president of the New York State Restaurant Association.

The minimum wage will also go up this weekend in 22 cities and counties, including San Diego, San Jose and Seattle.

The high number of states and localities raising the wage this year reflects the successful work of fast-food workers and organized labor, according to Tsedeye Gebreselassie, senior staff attorney at the National Employment Law Project, as well as federal inaction on the wage.

The national minimum was last raised, to $7.25, in 2009.