The City of Lafayette ( ) is a home rule municipality located in southeastern Boulder County, Colorado, United States. The city population was 30,411 at the 2020 United States census.

Geography Lafayette is located in southeastern Boulder County. It is bordered by the town of Erie to the north and east, by the city of Broomfield to the east and south, and by Louisville to the southwest. U.S. Highway 287 is the main road through the city, leading north to Longmont and south to Broomfield and Denver. State Highway 7 leads east from Lafayette to Brighton and west to Boulder. Exit number 229 off of Interstate 25 provides access to the city.

According to the United States Census Bureau, Lafayette has a total area of , of which is land and , or 1.50%, is water.

History

Lafayette was founded in 1888 by Mary E. Miller (née Foote). She filed the original Town of Lafayette plat in January 1888 and sold the first residential lot – Lot 6, Block G, Town of Lafayette – in March 1888 to Hugh Hughes. In February 1889, the Town of Lafayette was incorporated.

Mary Miller and her husband, Lafayette Miller, had moved to the area to farm land they had purchased in March 1868 from Denver coal speculators Francis P. Heatly and Edward Chase. The farm also included land acquired by Mary's brother, James B. Foote, and father, John B. Foote, via the Homestead Act in 1871. In 1874 the Millers moved to Boulder. Lafayette Miller ran a butcher shop and was a town trustee. Lafayette Miller died in Boulder in 1878, after which Mary Miller moved back to the farm with their six small children. In 1884 coal was discovered on the Miller farm, and in 1887 John H. Simpson acquired a coal lease from James B. Foote and sank the first Simpson Mine shaft, thereby starting the coal mining era. In 1888 Mary Miller designated of the farm for the town of Lafayette, which she named after her late husband. In July 1888 a second mine, the Cannon, went into operation and the first houses were built. Mary Miller submitted a revised plat for the town in 1889. Also in early 1889, Mary Miller leased the rights to mine coal for 12.5 cents per ton to Charles Spencer and John H. Simpson. The two commenced sinking the Spencer coal mine 200 yards west of the Simpson coal mine. On April 2, 1889, the town of Lafayette was incorporated. As stipulated in the original property deeds for the platting, no alcohol could be sold or distributed east of what is now known as Public Road. In 1904, the Lafayette Town Board mandated that the "alcohol clause" be added to all platted additions to Lafayette.

Lafayette quickly became a part of the coal-mining boom that all of eastern Boulder and southwestern Weld counties were experiencing, with the combined Spencer/Simpson mine being the largest and most productive. The Cannon floundered and failed to produce profitable quantities of coal. It closed in 1898. By 1914 Lafayette was a booming town with two banks and four hotels. Lafayette was also the location of one of the nation's first distributed electrical grids powered by the Interurban Power Plant that served Louisville, Boulder, Longmont, and Fort Collins.

Mary Miller continued to be a leader in the community, especially in January 1900, when the town's business district burned. She founded the Farmers’ & Miners’ State Bank with S.T. Hooper, C.C. Brown and G.C. Beaman in June 1892, which closed in August 1894. Mary Miller then formed the Lafayette Bank in 1900. She was elected president of the bank, and according to a Denver Post article reprinted in the Lafayette News and dated December 13, 1902, was "the only woman in the United States known to be president of a bank." The bank closed in 1914 because of roughly $90,000 in bad loans to the striking United Mine Workers. Mary Miller remained devoted to the temperance movement and eventually ran on the 1913 Prohibition Party ticket for the U.S. Senate seat won by Gov. John F. Shafroth. She also ran for the state treasurer seat on the Prohibition Party ticket. Miller died in 1921 at her daughter-in-law's home at 501 E. Cleveland Street.

Lafayette continued to thrive as a coal-mining town. Northern Coal Field miners, members of United Mine Workers, walked off the job in the aforementioned strike starting in April 1910. The United Mine Workers expanded the strike to all of Colorado in 1913. The Long Strike is nationally noted for the Ludlow Massacre of miners' families by the National Guard in the Southern Coal Field near Trinidad, Colorado.

Until about 1915, residents of the city were largely caucasian Midwestern transplants and Western European coal miners who'd immigrated from England, Wales and Ireland. The 1900 and 1910 census show no families with Latino surnames residing in Lafayette. Coinciding with the start of the Long Strike of 1910–1914, the coal operators began recruiting strikebreaker workers who were immigrants from Eastern Europe and Mexico. United Mine Workers Lafayette Local 1388 meeting minutes show scant traces of Latino membership from 1903 until September 1913. Initially banned from membership, union locals realized during the Long Strike of 1910–1914 the necessity of forming labor alliances with native-born and immigrant Latinos. Entering their $10 annual Lafayette Local 1388 dues at the September 25, 1913, meeting were initiates Frank Gonzales, S. Gonzales, F.H. Gallegos, A. Dominguez, Guy Dominguez, Jesus Guzman, Gabriel Vigil, Teofila Tafoya, D. Romero, Ben Martinez, Juan Guerrero and Francisco Guerrero. After the strike, Rocky Mountain Fuel Company encouraged their employees in the Southern Coal Field, largely immigrants from Mexico and second- and third-generation residents of New Mexico and Colorado, to relocate to the Lafayette area. Those Latino families located in Serene initially then moved to Lafayette after the Columbine Mine closed. In the 1920s and 1930s sugar factories in surrounding counties also recruited Latino workers to harvest sugar beets. The 1920 census showed 1,800 Lafayette residents, with 25 individuals having Latino surnames.

In 1927, Lafayette's coal miners walked off the job again, a strike nationally recognized as a great Wobbly (Industrial Workers of the World, a radical labor group) strike. The mining massacre resulted in the deaths of five Lafayette resident miners just northeast of town in the Columbine Mine massacre on November 27, 1927, in what is now the ghost town of Serene near Erie.

Another female financier came to the miners' aid. Josephine Roche, the daughter of John J. Roche, the anti-labor president of the Rocky Mountain Fuel Company (RMFC) which owned many of the mines in the Lafayette area, used some shares of the company she had inherited from her father after his death in 1927, bought a controlling interest in the company, and immediately began the most labor-friendly mine operation in the United States. She became a top assistant to Franklin D. Roosevelt's Secretary of Labor, Frances Perkins. Back in Lafayette, life became much better for the coal miners with the more labor-friendly management of the RMFC.

Coal mining declined as an industry from the 1930s through 1950s as natural gas replaced coal. The Black Diamond mine closed in 1956, and Lafayette became once more an agriculture-based community. As Denver and Boulder grew, residential growth in Lafayette increased. With the increase in residential growth, the farm-based economy changed and commercial, small industrial and manufacturing factors became more important. Lafayette's ethnic diversity continued to expand with population growth. In 1940, 76 Hispanic or Latino adults were recorded as residing in Lafayette, with a total population of 2,062. By 2016, 4,400 (18 percent) of Lafayette's 25,000 residents were Hispanic or Latino.

Industry Not only did coal mined in Lafayette, Louisville, Marshall and Erie heat Denver's growing number of households starting in the late 1880s, it also fueled Denver's smelters, cotton mills, breweries, paper mills, shoe factories and power plants.

In 1899, the Colorado Inspector of Coal mines estimated that the 405-square-mile Northern Coal Field contained 2.56 billion tons of coal.

Up to the turn of the 20th century, Denver customers consumed most of the coal mined in the area as fast it could be hauled up from the tunnels. Lafayette coal mines were wired for telephones starting in 1891, almost 15 years before the rest of town, because the Denver coal dealers needed a quicker way to place orders.

The first recorded evidence of coal near Lafayette was made in the summer of 1864 by General Land Office surveyor Hiram Witter, who noted in his field survey notebook for Township 1 South, Range 69 West that "In the NE 1/4 of the NE 1/4 of Sec. 1 is an outcrop of coal 1 chain long (66 feet) and 4 ft. thick, extent unknown." This is where Baseline Road crosses over Coal Creek east of Lafayette. Witter drew a line through a notation in his notebook that the "coal bank had been opened" and replaced it with "coal outcrop." The notation "had been opened" may indicate that the coal was being "worked" by settlers.

Area pioneers gathered coal from surface outcrops to use for home heating. One outcropping of coal, mentioned by Mary Miller as being discovered in 1872, was located at about the center of the Foote-Miller Farm and mined by the Cambro / Pluto slope mine from 1917 to 1928.

Mary Miller and her brother, James B. Foote, leased some of their farm land north of the Cambro / Pluto coal outcrop first to John H. Simpson, who would sink two separate Lafayette coal mines – the Simpson in late 1887 and the Spencer in 1889 – then to James Cannon Jr. in 1888. The Standard mine, about a mile east of the Spencer-Simpson mines, was also sunk in 1887.

By the early 1880s, railroads were the largest consumer of Colorado coal, and Lafayette joined the coal mining bandwagon when Colorado & Southern Railway completed a 3-mile spur from Louisville in 1889, paid for by the newly formed Spencer-Simpson Coal Company. That spur eventually connected to Erie. The railroad links to Erie, Louisville, Lafayette and Marshall coal mines nurtured the industrialization of coal mining.

The coal under Lafayette and most of the area northwest of Denver known as the Northern Coal Field or Northern Field is sub-bituminous coal, a soft, friable coal that was highly suited for household heating stoves and for firing steam boilers. Sub-bituminous coal, also called lignite, could sometimes spontaneously combust when it came in contact with air.

A significant factor in Lafayette's coal mining history were the three successive Denver-based coal conglomerates – United Coal Company, Northern Coal Co. and Rocky Mountain Fuel Company – that controlled coal production and employed thousands of local coal miners. From 1891, when United Coal was formed, to 1944, when Rocky Mountain Fuel Co. reorganized and closed most of its mines, the coal operators influenced not only how mass-scale coal was mined, marketed and sold, but how communities adjacent to the coal mines – Lafayette, Louisville, Erie, Canfield and Marshall developed.

In 1898, only 5 percent of coal mined in Lafayette was used for home heating, the rest went to Denver power plants, manufacturers and steam locomotives. From June 1, 1897, to May 31, 1898, over 680,000 tons of coal were shipped to Denver from Northern Field coal mines. In the 1920s and 1930s, Great Western Sugar in Longmont and the Valmont Generating Station in Boulder were primary coal consumers. By the mid-1940s, most of the coal mines had closed.