lˈuːkaʊ kˈaʊnti ɪz bˈoːɹdɚd baɪ sˈiːdls kˈaʊnti tə ðə nˈɔːɹθ, bˈaɪələ pˈɑːdlæskə kˈaʊnti tə ðɪ ˈiːst, ɹˈædzɪn pədlˈæski kˈaʊnti tə ðə sˈaʊθˈiːst, lˈuːbɑːɹtˌoʊ kˈaʊnti tə ðə sˈaʊθ, ɹˈaɪki kˈaʊnti tə ðə sˈaʊθwˈɛst ænd ɡˈɑːɹwəlˌɪn kˈaʊnti tə ðə wˈɛst.
Łuków County is bordered by Siedlce County to the north, Biała Podlaska County to the east, Radzyń Podlaski County to the south-east, Lubartów County to the south, Ryki County to the south-west and Garwolin County to the west.