Imatra is a city in the province of South Karelia in southeastern Finland. The city is home to 26,361 people (June 30, 2020), and Imatra's neighboring municipalities are Lappeenranta and Ruokolahti. Imatra is best known for Imatrankoski and Vuoksi, which flows through the city. Imatra State Hotel, as well as the Three Crosses Church designed by Alvar Aalto, are also well-known attractions. The largest employers are Stora Enso's Imatra mills, the City of Imatra and Ovako's steel mills. VR and the Finnish Border Guard's School of Border and Coast Guard and the Border Guard of South-Eastern Finland are also significant employers. The population growth of Imatra is negative.

In addition to the river, the cityscape of Imatra is characterized by fragmentation and detachment. Imatra has three centers, Imatrankoski, Mansikkala and Vuoksenniska. The Mansikkala district was once designed as the administrative center of Imatra, but today Imatrankoski has become the city center. Most of the specialty shops, restaurants and bars as well as the Koskenparta pedestrian street and the Koskentori shopping center are located in Imatrankoski. Agencies, the largest educational institutions, the Cultural Center, the Sports Center, the Travel Center and large supermarkets are located in Mansikkala. Recently, the construction of the Pässiniemi area between Imatrankoski and Mansikkala has begun. Vuoksenniska, located in the northeastern part of the city, also has a service center. In addition to these, basic services such as schools, grocery stores and kindergartens are also available in other major residential areas. In terms of population density, Imatra is the most densely populated municipality in South Karelia. 97 percent of the population lives in the Imatra city center, which is the only city in the city and also extends to the neighboring municipalities.

Finland's largest lake, Lake Saimaa, is a few kilometers from the city center. The guest marina and Imatra Spa are located on the shores of Lake Saimaa.

Imatra's location right on the Russian border gives the city an international stamp. The town of Svetogorsk (formerly Enso Finland) on the Russian side is about seven kilometers from the center of Imatra. Russian tourists are a common sight in the city and Russian tourism greatly benefits the local business community. Most of them go shopping in Imatra, and Imatra's tax-free sales are the third largest in Finland (only Helsinki and Lappeenranta are ahead). Many tourists also stay in the city overnight, which is reflected in higher hotel occupancy rates than the national average. In addition, in recent years, more and more Russians have bought an apartment for themselves in Imatra and the surrounding area.