O. C. Schulz & Sons is a family-owned and operated diversified potato farming operation in the Red River Valley of North Dakota.

Oakley's Premium Fresh Vegetables ltd is a producer of Vegetable products based out of New Zealand

Oakville Produce (formerly known as the Moraitis Group) was the biggest fresh potato business in Australia, good for 23 per cent of Australia's AU$625 million potato market. in May 2016, the company went into receivership and is currently for sale.

Oddball Organics™ potatoes are just as fresh and nutritious as regular organic potatoes, only difference being odd shapes or minor skin blemishes or minor mechanical damage

Okray Family Farms produces over 1800 acres of potatoes and over 5900 acres of sweet corn, green beans, peas, soy, and maize annually. They are closely affiliated with Indian Hills Cranberry, LLC.

Old Oak Farms offers a full line of potatoes including gold, red, russet and jumbo potatoes, along with seasonal specials such as baby potatoes.

Ontario Potato Dist. (Alliston) Inc.'s primary activity is potato farming, packing, storage, and distribution. Since its inception almost 50 years ago.

OSPGA is an organization of Ontario potato seed growers and breeders who work collaboratively to support the SPUD Unit through the University of Guelph, liaison with CFIA inspectors regarding seed certification and with OMAFRA to promote the best quality Ontario grown seed with stewardly production practices.

The Oregon State University (OSU) and its extension service devote a significant amount of effort to potato research, in areas such as variety development, Crop Management, Weed Control, Disease Control and Insect Control.

P J Lee and Sons - Highflyer Farms, are one of the largest individual potato producers in the UK, serving chip shops predominately.

Palacios Escutia S.L. is a Spanish company dedicated to the production, exportation, and importation of fruits and vegetables since 1983.

Palmgren farm is located in Colorado, United States. They are growing seed potatoes and some range of organic potatoes.

Palm Agricultural Production Company PAPCO was incorporated in 1982 in Kuwait as a shareholding company offering diversified agricultural solutions.

Located along the shores of the Pamlico Sound in Eastern North Carolina, Pamlico Shores grows, packs and ships quality produce. They produce potatoes on the farm.

Pan European Potato Enterprise, Ltd (Pep Ltd) is a company involved in the growing and marketing of seed and table potatoes for export (from the UK)

Papas Arcoiris is a family business, founded in 2002 by Boris Contreras Kusch together with his father Andrés Contreras (1943-2014). It is located in Puerto Varas, Los Lagos Region and is dedicated to the production of potatoes, of different colors and shapes, to market them both in Chile and in the most demanding markets in the world.

Pappins is the brand of Lazaro, under which they offer potatoes like Fry Potato, Red Potato, Mini Potato, Versatile Potato etc.

Parilla Premium Potatoes was established in 1990 by Allan Pye with his son, Mark Pye and daughter in-law, Fiona Pye. The Pye family moved to the Mallee Region from New Zealand after being approached by McCain's to grow potatoes for their Australian operation.