Prince Harry and Meghan Markle Looking for New House Near Montecito,

Prince Harry and Meghan Markle have apparently outgrown their 10,000 square-foot mansion ... because they're reportedly looking for greener, larger pastures.

The self-exiled royals are on the hunt for a bigger house in the uber-exclusive Hope Ranch area about 10 miles away from Montecito -- AKA Oprah Country -- this according to the Santa Barbara News-Press.

They're currently in a super-fancy home on a huge parcel of land -- by SoCal standards -- but they're doing a lot of work from home and also raising their 2 kids, so they apparently want more space.

They spent around $15 mil for their current home, and the prices in the area the News-Press says they're looking go as high as $22 million.

The Hope Ranch area has an exclusive country club, golf course ... and access to all sorts of fun stuff, including tennis courts, picnic areas and equestrian trails.