The list of Orenstein & Koppel steam locomotives shows photographically documented samples of representative Orenstein & Koppel (O&K) steam locomotives. The factory produced 14,387 steam locomotives from 1899 to 1945 at its Berlin site (Drewitz, Nowawes, Babelsberg) with the works number range from 337 to 12965.
{| class="wikitable sortable" |- ! Works No !! Year !! Photo !! Wheel arrangement !! Gauge !! Power !! Use |- | 109 || 1895 || || 0-4-0 || || 45 hp || Irinowska railway, Saint Petersburg N° 6 |- | 226–228 || 1897 || || 2-4-0 || || 150 hp || Vemb-Lemvig-Thyborøn Railway, Denmark |- | 302 || 1898 || || 0-4-0 || || 50 hp || Sugar factory Tapiau, construction of Zurich Airport, VEBA, Latvia Tp782, preserved at private owner, Rorschach, Switzerland, TäuffelenCarina Majer: Als die Lok wegtransportiert wurde, waren meine Geschwister da.Daniel Heer: SGEG DH A SWN120 Werkdampf-21B. Unbekannte Feldbahnlok der Bauunternehmung VEBA (Einzelstück). Nicht identifizierte Feldbahnlokomotive mutmasslich der Bauunternehmung VEBA AG mit Sitz in Zürich mit Kipploren an unbekanntem Aufnahmeort. |- | 366 || 1899 || || 0-4-0 || || 20 hp || Delivered via the O&K sales office in Budapest to Earl Károly Imre in Nagymágócs near Oroszhaza. 1941 used at the fortifications in Szolyva and in 1945 returned to Mattersburg in Austria. Now being operated in Feld- und Industriebahnmuseum Freiland, Austria.Orenstein & Koppel Fabr. Nr. 366, Baujahr 1899. |- | || ca. 1899 || || 0-4-0 || || 20 hp || Forêt de Meillant |- | 367 || 1899 || || 0-4-0 || || 20 hp || Delivered via the Swedish general agent Carl Ström to the Hamra–Tumba Järnvägen of Gustaf de Laval on Gotland in Sweden. From 1916 owned by the construction company Byggnads AB, who sold it to the city of Stockholm in 1917 for work on Hammarbyleden.Ulf Diehl: Okända ånglok. Sidospår 4/2009. |- | || 1899 || || 0-6-0 FL || || || Fireless locomotive |- | 418 || 1899 || || 0-6-0 || || || Bröl Valley Railway, BTE 14–17 |- | || 1899 || || 0-6-0 || || || Aktiengesellschaft für Feld- und Kleinbahnen-Bedarf |- | 514 || 1900 || || 0-4-0T || || 20 hp || Java, Sudhono Sugar Mill N° 5 |- | 531 || 1900 || || 0-4-2 || || 60 hp || Initially at sugar mill Nakel (Cukrownia Nakło), now Narrow Gauge Railway Museum in Wenecja, PolandCukrownia Nakło 531. |- | 533 || 1899 || || 0-6-2 || || 60 hp || Kleinbahngesellschaft Krone, für Wirsitzer Kleinbahn '9' |- | 576–578 || 1900 || || 0-4-4-0Mallet || || 120 hp || Kalan |- | 591 || 1900 || || 0-4-2 || || 80 hp || Kirchlengern–Hille railway (Wallückebahn) in Germany |- | 592 || 1900 || || 0–4–0, later 0-4-2 || || 80 hp || Kirchlengern–Hille railway (Wallückebahn) in Germany |- | 596 || 1900 || || Initially 0–4–0, later 0-6-0 || || 125 hp || Soest No 9 of the Ruhr-Lippe-Eisenbahngesellschaft in Germany. Used on the ‘quarry line’ Hüsten-Müschede and at Neheim-Hüsten station. Decommissioned in 1924, scrapped in 1930
| 614 || 1900 || || 0-4-0 || || 30 hp || Initially Pakis Baru 1, now Statfold Barn Railway |- | 617 || 1900 || || 0-6-2 || || 100 hp || Two-cylinder locomotive with three coupled axles and one radial axle. Steam bell, outer frame, upper water tanks. Delivered to the Rosenberger Kreisbahn |- | 673 || 1900 || || 0-4-0 || || 80 hp || Wackerow & Co, branch office Berlin |- | 683 || 1900 || || 0-4-0 || 508 mm (1 ft 8 in) || 10 hp || Dinty, Cosmopolitan Proprietary Mine, Kookynie, Western Australia"Dinty" in Service on the Gorge Line. Queenslander, 22 November 1928, p. 36. |- | 683 || 1900 || || 0-4-0 || 508 mm (1 ft 8 in) || 10 hp || Moira Coal Mine, Collie, Western Australia |- | || ca 1900 || || 0-4-0 || || || Transport of rubber in the Dutch East Indies |- | 687 || 1901 || || 0-4-0 || || 20 hp || Ceper 2, PG Gondang Baru, Klaten, Indonesia |- | 688 || 1901 || || 0-4-0 || || 20 hp || Delivered to Jonas & Co, Paris |- | 710 711 || 1900 || || 0-4-2 || || 30 hp || Cairo, Egypt |- | || || || 0-8-0 || || || |- | 718 || 1901 || || 0-4-0 || || 30 hp || Magnet No. 2, Magnet Silver Mining Co, Tasmania, now Wee Georgie Wood Railway |- | 719 || 1901 || || 0-4-0 || || 30 hp || Ordered by North Mount Farrell Mining in Tasmania but not operated there, later Cairns Town Council, Edge Hill Tramway, Queensland |- | 722 || 1902 || || 0-4-2 || || 30 hp || Srage Sugar Mill, Java, Sragi operator's N° 2 |- | 723 || 1900 || || 0-4-0 || || 30 hp || Kearsney–Stanger Light Railway in the Colony of Natal (now KwaZulu-Natal in South Africa)Kearsney-Stanger Light Railway 1901-c.1944.1 9 August 2010. |- | 724 || 1900 || || 0-6-0 || || 50 hp || Kearsney–Stanger Light Railway in the Colony of Natal (now KwaZulu-Natal in South AfricaRailway History Group: Bulletin No 113, November 2012. |- | 725 || 1900 || || 4-2-0|| || 40 hp || Monte Alegre for the Usina Monte Alegre sugar mill in Piracicaba in São Paulo Brazil |- | 731 || 1902 || || 0-4-2|| || 40 hp || East Murchison United Ltd, Lawlers, Western Australia |- | 772 || 1901 || || 0-4-2 || || 60 hp || Jatiroto J70, Jatiroto, PG Jatiroto, Indonesia |- | 773 || 1901 || || 0-4-2 || || 60 hp || Ngadirejo 71, PG Ngadirejo, Kediri, Indonesia |- | 777 || 1901 || || 0-4-2 || || 60 hp || Pajarakan 2 Kelut, PG Pajarakan, Probolinggo, Indonesia |- | || ca 1901 || || 0-4-2 || || 60 hp || Tender locomotive with open cab, traction pump, suspension, hand bell, melting plug. Built according to Dutch-Indian regulations. Delivered to India. |- | 810 || 1902 || || 0-4-0 || || 20 hp || The so-called Stink Express disposed waste and sewage sludge in Jodhpur, Rajasthan, India |- | 819 || 1901 || || 0-4-0 || 825 mm (2 ft in) || 20 hp || Burdekin, James Boyd, firewood supplier, Charters Towers, Queensland, Australia |- | 851 || 1902 || || 0-4-0 || || 30 hp || Initially P. Dinndorf, Strasbourg, now agricultural museum in Eschach-Seifertshofen, Germany |- | 882 || Delivered 1901 || || 0-4-4-0 Mallet || || 100 hp || Magnet Tramway No. 2, Tasmania. Supplied by Central Mining & Tramway Appliances Proprietary Ltd 1901.Derek A. Bayliss: The Origins of Orenstein & Koppel. The Industrial Railway Record. No 47, April 1973, p. 27-32. |- | 893 || 1901 || || 0-4-2|| || 60 hp || Merican 4, PG Merican, Kediri, Indonesia |- | 894 || 1901 || || 0-4-2|| || 60 hp || Merican 6, PG Merican, Kediri, Indonesia |- | 898 || 1901 || || 0-4-2 || || 60 hp || Rejosari 1 PG Rejosari, Madiun, Indonesia |- | 930 || 1902 || || 0-4-4-0 Mallet || || 80 hp || No 5 Hamra, Östra Södermanlands Järnväg, Sweden |- | 932-938 || 1902 || || 2-6-0 || || 400 hp || Utrillas & Co, Spain |- | 943 || 1902 || || 0-4-0 || || 100 hp || Douglas, Port Douglas Tramway from Mossman to Port Douglas in Queensland, Australia |- | || ca 1902 || || 0-4-0 || || || |- | || ca 1902–1912 || || 0-4-4-0 Mallet || || || Sigi railway, Tanzania |- | 979–981 || ca 1903 || || 0-6-0 || || || Merzig-Büschfeld railway company, Merzig/Saar, service No. 1-3
| 1001 || 1905 || || 0-6-0 || || 107 hp|| Asturias, No. 6, narrow gauge railway Valdepeñas–Puertollano (El trenillo de La Calzá), SpainCrónicas de la vía estrecha (I R): De Valdepeñas a Puertollano en "el trenillo de La Calzá". |- | 1079 || 1903 || || 0-6-0 || || 80 hp || Sold to J.E. Marland for Mercier France (see also N° 1081) |- | 1080 || 1903 || || 0-6-0 || || 80 hp || Sold to Jallut via the Orenstein & Koppel office in BrusselsLocomotive a 3 essieux accouples de 10 a 16 tonnes pour voies de 1000 et 1445 mm "Type entrepreneur" (O&K steam locomotive, works N° 1080, June 1903, 80 hp, 1000 mm gauge, Ct, 'Jallut über O&K Fil Brüssel'.) |- | 1081 || 1903 || || 0-6-0 || || 80 hp || Sold to J.E. Marland for Mercier France (see also N° 1079) |- | 1089 || 1903 || || 0-4-4-0 Mallet || || 150 hp || Lenz Type ii, built by Orenstein & Koppel, No 11–16 |- | 1134 || 1903 || || 0-4-0 || || 40 hp || Port Kunda Cement Factory |- | 1193|| 1903 || || 0-4-0 || || 20 hp || Topham, Jones & Railton, London, who owned also O&K N° 1511/1905 for use at Lyness, Orkney Islands |- | 1162 || 1903 || || 0-4-0 || || 80 hp || Initially Jacob & Bartisch construction company, Leipzig, later lignite mine Concordia, Nachterstedt, from 1930 lignite mine Gewerkschaft Humboldt, Thüste-Wallensen 8, since 1966 exhibited at the playground Seelze-Letter, since 1994 Emmerthal-Lüntorf, since 1996 narrow gauge museum Rittersgrün, Saxony, Germany |- | 1166 || 1903 || || 0-4-0 || || 50 hp || Minas de UtrillasSeñor Valero, Ejea de los Caballeros, Zaragoza, Spain. |- | 1167 || 1903 || || Bn2t || || 50 hp || Turba 3, Minas de Utrillas, Spain, since 1983 at the heritage railway Paderborn, since 1985 Guldental 1, Heddesheimer Feldbahn H&G Faust |- | 1211 || 1903 || || 0-6-0 || || 250 or 300 hp || KED Berlin, T3 Han 1858, Han 6197, DRB 89 7458 with Allan straight link valve gear |- | 1339 || 1904 || || 0-4-0 || || 10 hp || Initially Rigeo–Eretria railway, now railway museum Athens |- | 1358 || 1904 || || 0-4-4-0 Mallet || || 100 hp || Mallet locomotive with outer cylinders for the Bromberger Kreisbahnen ("von Eisenhardt") |- | 1403 || 1905 || || 0-6-0 || || 40 hp || Hacienda Tenextepango, Morelos, Mexico, 24-inch 0-6-0's O&K works Nos. 1403/1905 and 1404/1905 (delivered via Arthur Koppel) and 2128/1906 (via Hermann Sommer). The mill was dynamited in 1913 during the Mexican revolution |- | 1404 || 1905 || || 0-6-0 || || 40 hp || Hacienda Tenextepango, Morelos, Mexico, 24-inch 0-6-0's O&K works Nos. 1403/1905 and 1404/1905 (delivered via Arthur Koppel) and 2128/1906 (via Hermann Sommer). The mill was dynamited in 1913 during the Mexican revolution |- | 1411 || 1904 || || 0-4-0 || 22 inch (560 mm) || 20 hp || Northern Colliery Company, Waro Limestone Scenic Reserve, New Zealand. Sold on to New Zealand Cement Co. on Limestone Island in the 1910s and from there to Wilson's Portland Cement Co. in Portland in 1918, where it was operated as Bertha, now the Museum of Transport and Technology in Auckland.Museal erhaltene Lokomotiven O&K, Werk Berlin. 1 January 2014. Retrieved 4 February 2019. |- | 1422 || 1905 || || 0-6-0 || || 30 HP || Duke Schwarzenberg's Graphite Works Černá v Pošumaví (Schwarzbach) Jihočeský kraj (South Bohemian Region), wood fired |- | 1430 etc || 1904–1912 || || 0-8-0 || || 200 hp || No 11–20, (since 1910 Kattowitz 113–122), No 23 and 24, Kattowitz 125–126) and Kattowitz 127–130, seven were renumbered to 99 401–406 and 407–408. |- | 1450 || 1905 || || 0-4-4-0 || || 120 hp || Atlamaxac, built for Mr. Sebastian de Mier's ranch in Atlamaxac, Puebla, Mexico. |- | 1459 || 1905 || || 0-4-0 || || 125 hp || Domburg of the Utrecht builder J. van Noordenne, who sold it in 1908 to the builder Arntz in Millingen. Unusual track gauge of instead of 900 mm. |- | 1466–1470 and 1540 || 1905 || || 0-4-4-0 Mallet || || 200 hp || Lenz & Co for Imperial Colonial Railways in Togo, service weight 31 tons with the simple looking Orenstein patent valve operating system, which like the Hackworth and Klug types was based on Joy's radial valve gear. |- | 1473 || 1905 || || 0-4-4-0 Mallet || || 60 hp || Initially sugar mill Pakis Baru, now Statfold Barn Railway |- | 1475 || 1905 || || 0-4-0 || || 200 hp || Königliche Eisenbahndirektion Breslau for KWI Kat 16, later Prussian T 37 Nr. 118, used in May 1916 on the Poix-Terron–Châtillon railway |-