Pittsburgh, Pennsylvania · Founded 1870
Pittsburgh's Original Oyster House traces a disputed-but-durable seafood lineage to 1870, reached Market Square in 1871, and still serves its oversized fish sandwiches.
Original Oyster House is a working seafood tavern at 20 Market Square in downtown Pittsburgh and widely traces its business lineage to 1870. Published local accounts say the Oyster House first opened on a nearby Fifth Avenue corner, then moved into its present Market Square space in 1871, a location previously associated with Bear Tavern. Louis 'Silver Dollar Louie' Americus owned the business from 1916 to 1970, when Louis J. Grippo bought it; Jennifer Grippo is now identified as the owner.
Original Oyster House widely dates its Pittsburgh business lineage to 1870. Published accounts say it began on a nearby Fifth Avenue corner, but the earliest proprietor, original business name, and exact opening evidence remain disputed.
Source: Pittsburgh Post-Gazette, 'Let's Talk About: The Original Oyster House,' June 21, 2012; Pittsburgh Magazine, 'I'll Have a Couple of Those Original Oysters,' September 9, 2019; Original Oyster House official story.
Published accounts say the Oyster House moved to its present space at 20 Market Square, where Bear Tavern had reportedly operated earlier. The building's exact construction and tenancy history remain unresolved.
Source: Pittsburgh Magazine, 'I'll Have a Couple of Those Original Oysters,' September 9, 2019; Food Republic, 'The Pittsburgh Restaurant That Has Been Making Massive Fried Fish Sandwiches,' January 27, 2026; Rotgut, 'Oldest Bars in Pittsburgh,' April 17, 2023.
Louis 'Silver Dollar Louie' Americus acquired Original Oyster House and operated it until 1970. Restaurant histories credit his era with establishing the jumbo fish sandwich and other lasting menu features.
Source: Original Oyster House official story; Pittsburgh Magazine, September 9, 2019; Food Republic, January 27, 2026.
Louis J. Grippo bought Original Oyster House from Louis Americus, beginning the Grippo family ownership era.
Source: Original Oyster House official story; Food Republic, January 27, 2026; Pittsburgh Magazine, September 9, 2019.
Later accounts say Original Oyster House received a Pittsburgh History & Landmarks Foundation historic-landmark plaque or designation. The exact designation status and date require direct verification from the foundation.
Source: Food Republic, January 27, 2026; Steel City History, 'History of Original Oyster House Market Square Pittsburgh,' February 24, 2026.
Louis J. Grippo died, and reporting says ownership passed to members of his family, including his wife and daughter.
Source: Food Republic, January 27, 2026; Tasting Table, 'The Old-School Pittsburgh Spot Serving Giant Fried Fish Sandwiches For Over 150 Years,' December 5, 2025.
Jennifer Grippo was identified as owner of Original Oyster House in a Pittsburgh Dish interview, continuing the Grippo family's operation of the Market Square restaurant.
Source: The Pittsburgh Dish, Episode 089, 'Jennifer Grippo of the Original Oyster House,' February 8, 2026.
Every claim gets rated. A business's own website can never earn "documented."
The restaurant, Pittsburgh Post-Gazette, Pittsburgh Magazine, and current food histories consistently use 1870 as Original Oyster House's beginning. But the reviewed evidence does not identify a definitive original founder or first business name, and historical investigators have found competing accounts of early ownership and naming. The 1870 date is a strong traditional lineage claim, not a fully resolved founding record.
The restaurant and multiple Pittsburgh sources describe Original Oyster House as the city's oldest bar and restaurant. The claim is credible given its widely reported 1870 lineage and long Market Square presence, but its original founder, earliest business identity, initial location, 1871 move, and uninterrupted operating chronology are not fully resolved. The register therefore treats it as a leading claimant rather than a certified winner.
Published accounts place the Original Oyster House's 1870 opening at a nearby Fifth Avenue corner and say it moved into the present 20 Market Square space in 1871. The restaurant may have a 1870 business lineage, but the same-address-since-1870 claim is inaccurate.
The restaurant's own history, Pittsburgh Magazine, Food Republic, and Tasting Table agree that Louis Americus introduced the oversized fish sandwich and that Mary Americus developed the light coating used on fish and oysters. The shared story is detailed and persistent, but the review did not retrieve a period menu, recipe card, newspaper, or trade source establishing exact dates or proving culinary priority in the region.
Louis Grippo reportedly believed the Americus family may have introduced fish sandwiches to Pittsburgh, but no comparative local food history, period menu record, newspaper story, or trade account was reviewed that proves a Pittsburgh first. The restaurant can be credited with its distinctive long-running jumbo fish sandwich, not the region-wide invention claim.
Multiple restaurant histories report that Louis J. Grippo bought Original Oyster House in 1970 and that family members succeeded him after his 2017 death. A February 2026 interview identifies Jennifer Grippo as the owner. This supports a continuous Grippo family business-ownership line from 1970, while property ownership and the operating entity remain unverified.
The source record places Louis Americus's ownership from 1916 until his sale to Louis J. Grippo in 1970, about 54 years. The Americus family had a formative mid-20th-century role, but not more than a century of ownership.
The reviewed sources do not provide Prohibition-era city directories, restaurant licenses, liquor enforcement records, newspapers, or menus documenting Original Oyster House's operations between 1920 and 1933. The claim should not appear as established continuity history.
Original Oyster House has been at 20 Market Square since 1870.
Published accounts say Original Oyster House began in 1870 at a nearby Fifth Avenue corner and moved into its present Market Square space in 1871. The restaurant's traditional 1870 business lineage is separate from its current-address history.
Source: Pittsburgh Magazine, 'I'll Have a Couple of Those Original Oysters,' September 9, 2019; Food Republic, January 27, 2026.
Leopold Louis founded Original Oyster House in 1870 as the Silver Dollar Saloon.
The reviewed sources do not establish Leopold Louis as the founder or Silver Dollar Saloon as an early business name. 'Silver Dollar Louie' refers to later owner Louis Americus, who purchased the restaurant in 1916.
Source: Original Oyster House official story; Pittsburgh Magazine, September 9, 2019; Rotgut, 'Oldest Bars in Pittsburgh,' April 17, 2023.
The Americus family owned Original Oyster House for more than a century.
Louis Americus owned Original Oyster House from 1916 to 1970, about 54 years. Louis J. Grippo purchased the restaurant in 1970, beginning the current Grippo family ownership era.
Source: Original Oyster House official story; Food Republic, January 27, 2026; Pittsburgh Magazine, September 9, 2019.
Original Oyster House is conclusively proven to be Pittsburgh's oldest continuously operating bar and restaurant.
The restaurant is widely described as Pittsburgh's oldest bar and restaurant, but its 1870 origin, early ownership, original location, 1871 move, business-name history, and uninterrupted operating record have unresolved conflicts. The record treats it as a leading claimant rather than a certified citywide winner.
Source: Pittsburgh Post-Gazette, June 21, 2012; Pittsburgh Magazine, September 9, 2019; Rotgut, April 17, 2023.
The Oyster House survived because it remained a direct, practical downtown meal through changes in Market Square and Pittsburgh itself. Louis Americus made oversized fried fish sandwiches and breaded oysters central to the menu, while Mary Americus is credited in restaurant tradition with the light coating recipe still used in the kitchen. Louis J. Grippo, who had been thrown out of the Oyster House as a teenager after trying to steal a fish sandwich, bought the business in 1970 and helped preserve its no-frills tavern identity; later Grippo family ownership has kept that approach alive.
Original Oyster House is widely reported to have opened in Pittsburgh in 1870 and moved to its present Market Square space at 20 Market Square in 1871. Louis 'Silver Dollar Louie' Americus owned the restaurant from 1916 to 1970 and is credited with making its jumbo fried fish sandwich a signature dish. Louis J. Grippo bought the business in 1970, and Jennifer Grippo is now identified as its owner.
Original Oyster House is widely described as Pittsburgh's oldest bar and restaurant, with a business lineage commonly dated to 1870. This register does not yet certify the citywide title because its earliest ownership, first address, original name, move to Market Square, and complete operating continuity remain disputed or unverified. It is a leading Pittsburgh claimant, not a conclusively resolved winner.
No. Published accounts say Original Oyster House began on a nearby Fifth Avenue corner in 1870 and moved to its present 20 Market Square space in 1871. The current building or site was reportedly associated with the older Bear Tavern before the Oyster House arrived, so restaurant lineage and building age are separate questions.
Jennifer Grippo was identified as owner of Original Oyster House in a February 2026 Pittsburgh Dish interview. Her father, Louis J. Grippo, bought the restaurant in 1970, and Grippo family members continued the business after his death in 2017. This record does not independently establish the current legal operating entity or ownership of the Market Square property.
Original Oyster House histories credit Louis 'Silver Dollar Louie' Americus with introducing the jumbo fried fish sandwich and credit his wife Mary Americus with the light coating used on fish and oysters. The family story is widely repeated and plausible, but the reviewed evidence does not prove that the restaurant invented fish sandwiches for all of Pittsburgh or establish an exact introduction date.
20 Market Sq, Pittsburgh, PA 15222
(412) 566-7925
Original Oyster House is a Market Square seafood tavern known for oversized fish sandwiches. Check current hours, dine-in, takeout, payment, and event-day conditions directly before visiting.