County bbl % of total last yr 1. Ellis 3,213,196 6.8 1 2. Finney 2,829,800 6.0 2 3. Russell 2,647,054 5.6 3 4. Rooks 2,176,130 4.6 4 5. Barton 2,012,060 4.2 5 6. Seward 1,939,186 4.1 9 7. Ness 1,889,109 4.0 6 8. Butler 1,797,555 3.8 7 9. Stafford 1,593,086 3.4 8 10. Haskell 1,525,240 3.2 nr
County bbl 1. Butler 561,949,276 2. Barton 506,686,611 3. Russell 495,177,787 4. Ellis 442,718,443 5. Rice 327,816,274 6. Greenwood 293,016,118 7. Stafford 248,971,242 8. Rooks 219,263,983 9. McPherson 201,981,338 10. Cowley 173,764,909
These data are adapted from the work of Douglas L. Beene, Kansas Geological Survey.