05/29/2026
SPHS Centennial Celebration Series:
22/ JOHN I. HOLLY
His last name has become associated with many locations and businesses in South Plainfield. Starting in 1877 with Holly Grove Farm, it later appeared in real estate developments (such as Holly Park, Holly Crest, and Holly Manor), properties (Holly House and Holly Hill farm), streets (Holly Street, Holly Avenue, Holly Park Drive), businesses (including Holly Park Diner, Holly Park Video, Holly Park Insurance, Holly Park Florist, Holly Park Mower Service, and Holly Park Realty), land features (like Holly Pond, Holly Lake, and Holly Brook), Holly Park Boy Scout Troop #1, and the Holly Grove Herd of award-winning cattle.
John I. Holly, born 1844 in Stamford, CT, was a man of wealth, influence and social standing who could trace his ancestry to the Mayflower’s arrival at Plymouth in 1620. He was president of the Commercial Alliance Insurance Company of New York City, and an important man in the Standard Oil Company, as well as a Colonel in the New York National Guard, 65th Regiment, Company C of Brooklyn. He lived part-time, then full-time for 30+ years in South Plainfield beginning with the acquisition of 46 acres at the southern end of Park Avenue and along Oak Tree Avenue around 1873.
Like many wealthy Wall Street financiers and New York industrial leaders, John Holly was drawn to Plainfield and the surrounding area as it changed from a rural village into an affluent Victorian suburb and resort destination in the early 1870s. This marked the start of Plainfield’s Gilded Age, fueled by Central Railroad of New Jersey passenger service, which brought businessmen, their families, and developers to the picturesque countryside for weekend visits or summer stays that often led to the construction of large permanent estates. John Holly was one of them.
Holly acquired at least three more properties along the Park Avenue corridor in South Plainfield, including a major expansion in 1877 of the Park and Oak Tree tract to 275 acres — an area that today includes Oak Park Commons and the open-space parcel formerly part of ASARCO. Holly Grove Farm stretched north and south along Park Avenue, east and west along Oak Tree Avenue, and north along Woodland Avenue.
Holly’s Jersey cattle breeding and dairy operation at the farm achieved national recognition for its all-around excellence. The facility featured advanced architectural designs capable of accommodating approximately 80 head of cattle, and was equipped with steam-powered grist mills, grain carriers, silos, platform scales, steam pumps, integrated water and gas distribution systems, and an innovative ventilation system.
The stock that Holly imported and selectively bred consistently exhibited superior quality in both competitive shows and auctions. The registered Holly Grove Jersey herd was carefully developed to become one of the nation’s premier dairy herds, renowned for producing dairy products of exceptional quality. Holly achieved prominence within the Jersey cattle breeders' national organization, serving as president, secretary, and treasurer of the association. He was respected for his extensive knowledge of Jersey cattle breeding lines and promotion of the breed in America.
His foremost passion, however, was for horses. Recognized as an accomplished horseman, he participated in trotter races, rode with the Watchung Hunt Club, and organized numerous equestrian events for Plainfield’s distinguished equestrian community. At Holly Grove, one barn was exclusively reserved for his carriage horses, hunters, and racers.
Holly and his colleagues who shared interests in cattle and horses served as officers and directors of the Union and Middlesex Counties Mutual Agricultural Association. This group purchased the Plainfield Driving Park in the early 1870s and inaugurated the area's first County Fair in 1879 where they showcased their own livestock. Although the fair was discontinued after five years, it was not attributed to any fault of the association. Holly remained involved with the association following the reorganization of the group in 1884 when harness racing resumed at the track. In 1887, Holly Grove was sold to Civil War veteran General Samuel K. Schwenk, who continued its breeding and dairy operations.
After the sale of the dairy farm, the Holly family bought the former Laing farm on upper Park Avenue across from the fairgrounds and made it their permanent home. The estate, spanning 100+ acres, featured a scenic 700-foot driveway flanked by established maple trees leading from Park Avenue. A 6-acre spring-fed pond on the property provided recreation, while the expansive, c. 1801 three-story wood-framed house boasted 18 rooms with bright interiors and sun-drenched verandas. From its elevated position on the south side of the pond — about 150 feet away — the house overlooked more stately trees, lush lawns, a stable for Holly’s horses, an icehouse, and the picturesque 60-foot-wide pond that stretched roughly 200 feet along modern-day Maple Avenue where Holly’s children spent many hours boating and fishing in the well-stocked pond.
The Holly family’s busy social life, first established in New York, continued in Plainfield. As Wall Street wealth poured into the area, Plainfield became both a fashionable weekend escape and a year-round home for many of the nation’s wealthiest residents. High society filled its calendar with resort galas at the famed Hotel Netherwood, dinner parties, fox hunts, harness racing at the fairgrounds, and private recreation at the new Hillside Tennis and Golf Club on Woodland Avenue, now the Plainfield Country Club. Two of Holly’s daughters, Margaret and Mary, became tennis champions there.
Holly was active in community affairs, particularly in the early days of the movement to separate from Piscataway. He retired following the death of his wife in 1906 and moved back to Connecticut in 1907 when the farm was sold to Milton Mendel. His daughters remained in the area, and his son joined the navy. Holly died in 1911.
Notably in 1907, Margaret began a 31-year career as executive secretary of the Charity Organization Society of Plainfield and No. Plainfield. Though she grew up privileged and in the lap of luxury, her life was defined by aiding the poor and needy to bring relief to the plight of the less fortunate. Upon her death, flags in Plainfield were flown half-staff.