Before it was Karditsa, the settlement at this spot was called Sotira, a small Ottoman-era village. By 1810, when the English traveler William Martin Leake passed through, he found a sprawling place of 500 to 600 houses, with a majority Turkish-speaking population — a typical Thessalian market settlement of the period. The region joined Greece in 1881, when Thessaly was ceded to Greece by the Ottoman Empire under the Convention of Constantinople, and Karditsa was officially incorporated as a city in 1882. It grew steadily through the 20th century as an agricultural service center for the fertile surrounding plain. During World War II, the Greek People's Liberation Army — ELAS — temporarily liberated the city on March 12, 1943, as part of a wave of resistance successes across central Greece that spring; the resistance in Thessaly was fought primarily through this region. In September 2020, catastrophic floods struck the city, resulting in four deaths and widespread damage. The city has rebuilt. Its character — unhurried, flat, practical — has reasserted itself.

Karditsa's cycling culture runs deeper than bike lanes. The city's diameter — roughly 3.5 kilometers at its widest — means virtually any destination is reachable within fifteen minutes on two wheels. The terrain offers no hills to discourage the casual rider. The first dedicated bicycle path was built in 2003 with Ministry of Transport funding, the engineering carried out by the National Technical University of Athens. The network now extends to about 17.8 kilometers of dedicated infrastructure. In the spring of 2018, Karditsa won first place in the national 'Bike to Work' competition, measured by employee participation rates. Families here do not own one bicycle the way families elsewhere own one car; they own several. The bicycle has become genuinely central to how the city moves — not a weekend hobby, not a statement of environmental virtue, but the ordinary way to go from home to school to market.

For a city of roughly 40,000 people, Karditsa's list of notable people reaches well beyond what the numbers might suggest. Stefanos Tsitsipas, one of the world's top professional tennis players, has roots here. So does Helena Paparizou, the singer who won the Eurovision Song Contest for Greece in 2005. General Nikolaos Plastiras, who led the Greek coup of 1922 and served as Prime Minister in the mid-20th century, was born in the Karditsa region; his statue stands in the city. The War of Independence hero Georgios Karaiskakis was also from this area. Three Olympic-level race walkers — Antigoni Drisbioti, Alexandros Papamichail, and Panagiota Tsinopoulou — trained here and competed on the world stage. The University of Thessaly has several departments in Karditsa, including the Veterinary Medicine Department, one of only two in all of Greece. The presence of the university keeps the city connected to a younger population and a wider world than its modest size might otherwise allow.

Karditsa's geography shapes everything about it. The Thessalian Plain spreads in every direction — rolling wheat and corn country, productive and unremarkable — until the mountains appear at the edges: the Pindos range to the west, the ridgelines of Agrafa, the heights above Trikala. The city itself is the plain made urban: grids of streets, a central square, the slow pace of a place that has never been in a particular hurry. The Palaiofarsalos-Kalambaka railway connects it to Athens and Thessaloniki, making it less isolated than it might appear. The Mediterranean climate delivers hot dry summers and cool wet winters. Once, there was a neighborhood called Vlachomachalas, home to Vlach-speaking Aromanians — one of many ethnic threads woven through Thessaly's history. That past lives mostly in documents now. What lives in the streets is the clatter of bicycles, the smell of coffee from the kafeneion terraces, and the particular quiet of a city that has figured out, more or less, how it wants to be.