Willamette Valley growers formed the Oregon Hop Growers Association (OHGA) in 1955. A voluntary organization, the OHGA broadly aimed to assist with marketing and grower education, but also to foster relationships in a tight knit community. This dual mission of supporting professional and community successes is reflected in their articles of incorporation: "disseminate knowledge concerning cultural practices in the growing of hops, conduct research in the growing, marketing and consumption of hops, facilitate marketing of hops by members of the corporation and in general to do all things which tend to promote a healthy hop industry within the State of Oregon."

In the early 1960s growers began investigating the potential benefits of state support in the form of a hops commodity commission; the Oregon Hop Commission was formed in 1964 with a dues structure that paid for state and grower sponsored research program. There is deep overlap between the OHGA and the Oregon Hop Commission, with the same families represented in both organizations.

The OHGA has worked with scientists and Extension agents from Oregon State College, collaborated with grower organizations in other states, hosted social events and annual field days. Many growers also joined the Hop Growers of America, a national organization with similar goals.

Dating back to the late 1800s, there were several organized growers’ associations for the hops industry in Oregon. Some groups were informal collections of growers, while others were more established and organized, but most focused on forming a "cooperative" or "union" dedicated to sharing information, pooling resources to buy supplies in bulk, state and national advocacy, setting standard wages for pickers, and stabilizing all sizes of growers in the industry. The earliest noted in newspapers are the Southern Oregon Hop Growers Association and the Willamette Hop Growers Association (WHGA); both associations are referenced in articles from 1886, and a Eugene "branch" of the WHGA was established in 1888. Growers from Polk and Yamhill officially formed the Willamette Valley Hop Growers Association in 1889 to discuss labor issues, evaluate the impact of pruning on the hop crop, investigate alternatives for processing and packaging, and whether a standard box size is needed. In 1893, the hop growers of Lane County announced they would incorporate an association, and in 1895 growers in Independence followed suit, noting that they wanted to invite professors from "the College" (Oregon Agricultural College) to attend meetings.

In 1889, Willamette Valley growers organized a different type of support organization: The Hop Growers Mutual Protective Fire Association. This groups offered insurance to growers impacted by fires; initially, the association was based in Salem, but by 1896 it had moved to Butteville. It later became the Hop Growers Fire Relief Association of Butteville, Oregon.

In October 1899, 100 growers, representing eight county-based growers' associations, met in Woodburn to organize into the first “Oregon Hop Growers Association" (OHGA), which is alternately referred to as Willamette Valley Hop Growers Association. It was referred to as a "farmers organization" for "cooperation and self-protection." They called for representatives from each county, drafted articles of incorporation, and elected officers (W.H. Egan was president, Henry Fletcher was secretary). Their focus was on securing a better market for hops; improving business methods and financial interests for members by working with banks and purchasing property; investigating the most economical method of pruning, "polling," or wiring; and improving methods of cultivation and selection of soils. The OHGA also sought to steady the market and maintain prices by regulating sales through the creation of combined "pools" of hops under the control of the organization; these were then sold to a sales commission. With a suite of offices in Salem, the group was active over the next few years, focusing on pooling hops, combatting "short-sellers" who offer unfair prices in the market, and successfully brokering deals with international buyers. By the end of 1900, there were 250 members and more counties included; growers in Lane County, a major growing region at that time, did not join but still called for greater local collaboration. This association was notable for its statewide reach and exclusion of buyers in favor of a grower-based group.

By August 1905, OHGA has disbanded and was reborn as the as the "Willamette Valley Hop-Growers Association" (WVHGA) Their work, similar to the former OHGA, focused on the collection and dissemination of accurate information regarding supply, demand, and the state of the market. However, they wanted to actively protect growers from dealers or buyers manipulating the market; as such, they had the corporate power to directly buy and sell hops for members rather than through a third-party sales commission. They created a members-only information bureau that was funded by members' fees.

Many early local associations informally gathered with other West Coast groups to attend meetings of the Hop Growers Association of Northwest, but in December 1907, driven by the continued challenges of working with brokers and the uncertainty of the market, West Coast growers met to discuss a formal multi-state association that they called the "Pacific Coast Hop Growers Union." At this point, there were over 1,400 growers in Oregon, which guaranteed they would likely control the association. While interest in Oregon was high for forming an association to support a healthy industry, there was growing concern in 1908 about a nationwide alcohol prohibition and its potential impact on the hops and barley industries. Over the next several years regional or local associations focused on stabilizing the market, as well as communicating the positive economic impact of the industries at state and national levels.

In summer 1914, a formal "State Board of the Hop Growers and Dealers Association of Oregon" was formed and growers started a fund to support a campaign to oppose Prohibition. At this time, it was estimated that there were 2,000 growers in Oregon, 250 in California, and several hundred in Washington. In fall 1914, the coastal hop growers organized again, this time advocating to merge into a formal Pacific Hop Growers Association (PHGA), with incorporated state associations. However, despite the increasing of local options to prohibit alcohol, the PHGA was not formed to combat Prohibition, rather to focus again on stabilizing the market and the impact of "short-sellers" on prices. As such, they wanted to control the entire output of the three coastal states and support growers of all sizes in financing and marketing their crops; the growers’ organization would have the ability to borrow money from banks and loan it to individual farmers. Those already involved in the talks set upon a major promotional campaign to sign up growers in Oregon; in most cases they were met with great enthusiasm because most felt their needs were not being met by dealers; they also blamed dealers for failures of past organizations or efforts to organize. In addition to creating an international information network, the PHGA wanted to establish scientific standards for grading, as well as a department to evaluate and rate hops for growers. During the fall of 1914, to avoid violating anti-trust laws, three separate state organizations formed.

In February 1915, incorporation papers were filed with the Secretary of State to (again) form an Oregon Hop Growers Association. Officers of record included Phil Metchan Sr. (Portland), William Bagley Jr., JR Cartwright (Harrisburg), MA March (Halsey), and JL Clark (Springfield). They raised $150,000 divided into 15,000 shares sold at $10 each. Amidst reports that the organization hadn't enrolled enough growers to meet their obligation to the PHGA and was in danger of failing, Portland-based grower Sied Back, who owned or controlled several hundred acres in Oregon, joined. This essentially guaranteed all other Chinese growers would join and there will be enough growers to form the state organization.

For the first year the organization appeared to be thriving, with great success in international crop sales for 1915. Unfortunately, by 1916 there were reports of a railroad car shortage, bad crop yield, fewer new plants in the ground, an increasing number of growers leaving the industry, a British embargo on hops, accusations of mismanagement, and a near guarantee of a nationwide Prohibition. In 1918, the OHGA was disbanded; it was seen as a useless organization that no longer supported grower needs.

Hops continued to sell through the years of Prohibition, and in 1933 there was demand for a new statewide growers’ association to tackle what growers called “discriminatory legislation” related to alcohol legalization, as well as combat serious issues with disease and pests. In January 1933, Dean Walker was elected president of the new Oregon Hop Growers Association, which was based in Silverton; this organization began publishing the Oregon Hop Grower that same year. This publication was dedicated to the interests of west coast growers and carried the official news of the organization, including meeting minutes and names of officers, and was also a place for Oregon Agricultural College researchers to share their findings.

In November 1933, the Oregon Hop Grower also became the official publication for the Yakima Valley Hop Growers Association and United Hop Growers of California; a name change in January 1934 to the Pacific Hop Grower reflects this broader audience. The publication editor announced that a Pacific Coast organization was imminent, driven by a need to cooperate to address mutual problems like market regulation and continued threats of Prohibition. Unfortunately, by 1935 only one-quarter of members paid their dues and few attended district meetings. In Oregon, participation was lower, though the total number of growers was listed at 630 with average 30 acres/grower. The Pacific Hop Grower ceased publication in 1940, and a multi-state organization was not formed.

In 1943, the United States Hop Growers' Association formed, and from 1944 to 1954 they published The Hopper, another publication focused on supporting growers, brewers, and those in related industries with articles on crop forecasts and yields, mechanization and technological advances, pests and diseases, social issues, and scientific research.

In Oregon, many of the same families organized again in 1955 to form the next iteration of the Oregon Hop Growers Association.