Lidzbark County (Polish: powiat lidzbarski) is a unit of territorial administration and local government (powiat) in Warmian-Masurian Voivodeship, northern Poland. Its administrative seat and largest town is Lidzbark Warmiński, which lies 38 kilometres (24 mi) north of the regional capital Olsztyn. The only other town in the county is Orneta, lying 30 km (19 mi) west of Lidzbark Warmiński.

The county covers an area of 924.42 square kilometres (356.9 sq mi). As of 2006 its total population is 43,006, out of which the population of Lidzbark Warmiński is 16,390, that of Orneta is 9,380, and the rural population is 17,236.

Lidzbark County came into being on January 1, 1999, as a result of the Polish local government reforms passed in 1998.

Lidzbark County is bordered by Bartoszyce County to the north-east, Olsztyn County to the south, Ostróda County to the south-west, and Elbląg County and Braniewo County to the west.

The county is subdivided into five gminas (one urban, one urban-rural and three rural). These are listed in the following table, in descending order of population.

Gmina	Type	Area (km)	Population (2006)	Seat
Lidzbark Warmiński	urban	14.3	16,390
Gmina Orneta	urban-rural	244.1	12,701	Orneta
Gmina Lidzbark Warmiński	rural	371.0	6,733	Lidzbark Warmiński *
Gmina Lubomino	rural	149.6	3,717	Lubomino
Gmina Kiwity	rural	145.4	3,465	Kiwity
* seat not part of the gmina

• Polish official population figures 2006