Some of the earliest inhabitants of the area were the mysterious Leghoya people. Not much is known about them, but ruins of their settlements dating back to c.1400 can be found in the area. During the mid-1800s, the area prior to the formation as a village, was an outspan area for resting teams of draw animals transporting goods across the region mainly due to the water of the small lakes dotting the area. Modern Ermelo was founded by Dutch Reformed ChurchReverend Frans Lion Cachet. He would minister to the many farms in the area. A congregation was started by Cachet in 1870, and was recognised by the 5thannual general meeting of the church in April 1872. The town would be formed on the farm Nooitgedacht purchased from P.J. Fourie in 1879 and proclaimed on 12 February 1880. It would be managed by the church until 1895 when the government of the South African Republic took over its management. Cachet named it after a town in the Netherlands. Cachet was an outspoken preacher, who had a strong interest in evangelism to Jews, his own family having Jewish heritage. Cachet had met and been influenced by Hermanus Willem Witteveen from Ermelo in the Netherlands as a young man, and named the settlement in honour of Witteveen. In 1901, the town was reduced to a single standing home by the British during the Second Boer War. The town would be rebuilt in 1903.
Economy
Agriculture
Mixed farming such as maize, cattle, potatoes, beans, wool, pigs, sunflower seeds, nuts, sub-tropical fruits, lucerne and sorghum take place around the district. The town is the home of the Nooitgedacht Agriculture Development and Research Centre that researches crop production and animal husbandry.
Municipality — A municipal board was established for Ermelo in 1903. By 1931, it had assumed a . The arms were registered with the Transvaal Provincial Administration in January 1957 and recorded at the Bureau of Heraldry as part of a municipal flag in 1967. The arms were : Per pale, dexter Or, a mining headgear Sable; sinister Vert, a sheep-shear and spade in saltire, handles upwards, Argent; on a chief Gules a phoenix on a nest enflamed, Or. In layman's terms, the shield was divided vertically, displaying a black mine headgear on a golden background and a crossed sheep-shear and spade on a green background, and across the top was a golden phoenix on a red horizontal stripe. The motto was Stabiliter progrediens. Municipality — The Ermelo transitional local council which administered the town during the local government reorganisation in the late 1990s, registered its own arms at the Bureau of Heraldry in May 1998. The arms were: Per fess Or and Vert, charged over the partition line with five lozenges conjoined, per fess Sable and Argent; in chief a phoenix Sable issuant from flames Gules and in base sheep shears and a spade in saltire, blades to base, Argent. In layman's terms, this shield was divided horizontally into gold and green, with a black phoenix at the top and a crossed silver sheep-shear and spade at the bottom, and across the centre a row of five diamond-shapes divided horizontally into black over silver. The crest was a green mural crown with the brickwork outlined in gold. The motto was Stabiliter progrediens. These arms have been taken over by the Msukaligwa municipality, of which Ermelo now forms part.
Ermelo is the crossroads of three national highways, N2, N11 and the N17, only Pretoria and Johannesburg are crossed by more. The N2 freeway connects Ermelo south east to Piet Retief 105 km away and eventually Richards Bay 417 km from the town. The N11 South connects the town to Newcastle, 152 km to the south and Ladysmith 250 km away and the N3 to Durban. The N11 north connects it to Middelburg, 108 km away and the N4 freeway west to Pretoria. The N17 West connects the town to the southern suburbs of Johannesburg and N17 east to eSwatini.
