Orange County-based automakers saw June sales grow even as the national monthly sales total slowed from the year-ago period.

Vehicle sales nationally totaled 966,909 vehicles, down 8.2% from a year earlier, according to Woodcliff Lake, NJ-based Autodata Corp.’s online automotive researcher Motor Intelligence.

The annual sales pace, or seasonally adjusted annual rate, picked up in June despite the month-to-month drop off. Automakers finished June on track to sell 14.08 million vehicles this year after falling below 14 million for the first time this year in May, according to Motor Intelligence.

OC’s largest automaker, Hyundai Motor America Inc., sold 63,813 vehicles, up 8% from a year earlier.

Hyundai, part of South Korea-based Hyundai Kia Automotive Group, is temporarily headquartered in Costa Mesa while its Fountain Valley office campus is being built.

Hyundai’s sister company, Irvine-based Kia Motors America Inc., sold 51,326 vehicles, up 13.9% from a year earlier.

Mazda North American Operations, headquartered in Irvine, reported vehicle sales up 3.1% from a year earlier to 19,911.

Mazda’s Japan-based parent Mazda Motor Corp. said Tuesday it plans to double production of its SKYACTIV engines in October to 800,000 annually.

American Suzuki Motor Corp. of Brea sold 2,299 vehicles, up 1% from a year earlier.

Cypress-based Mitsubishi Motors North America Inc.’s sales fell 34% in June to 5,477 vehicles after stopping production of three vehicle models last summer. Vehicle sales, excluding the impact of the three discontinued models, were up 10.2% in June.