Ganj Dundawara is a city and a municipal board in Kasganj District and the Aligarh zone in the state Uttar Pradesh, India.

Ganj Dundawara is located at 27.43°N latitude and 78.56°E longitude. It has an average elevation of 166 m (545 ft). The city is situated in Gangatic plain. The Ganges is the nearest (8 km [5.0 mi]) holy river to the city.

Ganj Dundawara has a humid subtropical climate. The winters are moderate. The summers are hot and dry, with temperatures regularly exceeding 35 °C (95 °F). The monsoon season runs from the end of June to September. During the monsoon season, almost daily showers are a common phenomenon. From October onward, the weather is pleasant. Proper winter begins in early December.

As per the 2011 Indian Census, Ganj Dundawara had a total population of 45,385, of which 23,801 were males and 21,584 were females. Population within the age group of 0 to 6 years was 6,746. The total number of literates in Ganj Dundawara was 23,245, which constituted 51.2% of the population, with male literacy of 55.7% and female literacy of 46.3%. The effective literacy rate of 7+ population of Ganj Dundawara was 60.2%, of which male literacy rate was 65.4% and female literacy rate was 54.4%. The Scheduled Castes population was 4,361. Ganj Dundawara had 6981 households in 2011.

According to the 2001 India census, Ganj Dundawara had a population of 41,245, with 53% males and 47% female. It had an average crude literacy rate of 44%, lower than the national average of 59.5%: male literacy is 51%, and female literacy is 38%. 18% of the population was under 6 years of age.

Ganj Dundawara has a municipal corporation. Haji Munavvar Hussain of the Samajwadi Party is current mayor of Nagar Palika Parishad Ganjdundwara.

Ganj Dundawara is situated on the Kanpur-Kasganj-Mathura electrified railway line. Trains are available to various major cities. The main express train which stops at Ganj Dundawara is the Ahmedabad-Gorakghpur Express (19409/19410). The town is connected to the district headquarters, Kasganj, by railway and road. UPSRTC provides various bus services from Ganj Dundwara to Etah (38 km [24 mi]), Delhi (250 km [160 mi]), Agra (120 km [75 mi]), Aligarh (90 km [56 mi]) and Bareilly (100 km [62 mi]).

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