| Chełmno County | |
| Native Name: | Powiat chełmiński |
| Settlement Type: | County |
| Total Type: | Total |
| Image Map1: | Kujawsko-pomorskie (EE,E NN,N).png |
| Map Caption1: | Voivodeship on a map of Poland |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Kuyavian-Pomeranian |
| Area Total Km2: | 527.62 |
| Population Total: | 52018 |
| Population As Of: | 2019 |
| Population Density Km2: | auto |
| Population Urban: | 19605 |
| Population Blank1 Title: | Rural |
| Population Blank1: | 32413 |
| Coor Pinpoint: | Chełmno |
| Coordinates: | 53.3658°N 18.4228°W |
| Seat: | Chełmno |
| Parts Type: | Gminas |
| Parts: | Total 7 (incl. 1 urban) |
| P1: | Chełmno |
| P2: | Gmina Chełmno |
| P3: | Gmina Kijewo Królewskie |
| P4: | Gmina Lisewo |
| P5: | Gmina Papowo Biskupie |
| P6: | Gmina Stolno |
| P7: | Gmina Unisław |
| Blank Name: | Car plates |
| Blank Info: | CCH |
| Website: | http://www.powiat-chelmno.pl |
Chełmno County (Polish: powiat chełmiński) is a unit of territorial administration and local government (powiat) in Kuyavian-Pomeranian Voivodeship, north-central Poland. It came into being on 1 January 1999, as a result of the Polish local government reforms adopted in 1998. Its administrative seat and only town is Chełmno, which lies 400NaN0 north of Toruń and 400NaN0 north-east of Bydgoszcz.
The county covers an area of 527.62km2. As of 2019 its total population is 52,018, out of which the population of Chełmno is 19,605 and the rural population is 32,413.
The county includes the protected area called Chełmno Landscape Park, which stretches along the right bank of the Vistula river.
Chełmno County is bordered by Świecie County to the north, Grudziądz County and Wąbrzeźno County to the east, Toruń County to the south, and Bydgoszcz County to the south-west.
The county is subdivided into seven gminas (one urban and six rural). These are listed in the following table, in descending order of population.
| Gmina | Type | Area (km2) | Population (2019) | Seat |
| Chełmno | urban | 13.6 | 19,605 | |
| Gmina Unisław | rural | 72.5 | 6,967 | Unisław |
| Gmina Chełmno | rural | 114.1 | 6,084 | Chełmno * |
| Gmina Stolno | rural | 98.4 | 5,278 | Stolno |
| Gmina Lisewo | rural | 86.2 | 5,212 | Lisewo |
| Gmina Kijewo Królewskie | rural | 72.2 | 4,529 | Kijewo Królewskie |
| Gmina Papowo Biskupie | rural | 70.4 | 4,343 | Papowo Biskupie |
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