Illinois, Indiana, Michigan, Ohio and Wisconsin
Total revenue: $2,304.72 million. Average firm growth: 10.06%
The region held steady in 2018, with overall revenue and an average growth rate roughly even with 2017 — though a number of firms managed significant growth, notably Top 100 Firms Cohen & Co., Rehmann and Rea & Associates, and Regional Leader Kutchins, Robbins & Diamond.
| Firm | Headquarters | Rev. ($ mn) | % chg. | Offices | Partners | Total emps. |
| Plante Moran | Southfield, Mich. | 542.58 | 4.17 | 22 | 274 | 2,495 |
| Wipfli | Milwaukee | 323.60 | 14.63 | 48 | 253 | 1,819 |
| Sikich* | Chicago | 169.00 | 11.26 | 16 | 92 | 786 |
| Rehmann | Troy, Mich. | 143.00 | 23.28 | 22 | 164 | 856 |
| FGMK | Chicago | 99.00 | 1.02 | 2 | 72 | 408 |
| Cohen & Co. | Cleveland | 96.43 | 31.41 | 12 | 69 | 556 |
| Katz, Sapper & Miller | Indianapolis | 94.67 | 19.32 | 3 | 42 | 445 |
| Hill, Barth & King | Canfield, Ohio | 94.00 | 17.50 | 16 | 83 | 484 |
| Blue & Co. | Carmel, Ind. | 83.24 | 5.67 | 10 | 50 | 465 |
| Doeren Mayhew | Troy, Mich. | 74.83 | 7.65 | 5 | 58 | 324 |
| SVA CPAs | Madison, Wis. | 65.82 | 15.78 | 5 | 43 | 285 |
| Clark, Schaefer, Hackett & Co. | Cincinnati | 64.24 | -5.28 | 6 | 42 | 405 |
| Skoda Minotti | Cleveland | 58.55 | 9.11 | 4 | 41 | 288 |
| Rea & Associates | New Philadelphia, Ohio | 50.41 | 23.37 | 12 | 53 | 301 |
| Kemper CPA Group | Evansville, Ind. | 45.68 | 4.55 | 29 | 69 | 331 |
| Somerset CPAs | Indianapolis | 37.24 | 10.28 | 3 | 33 | 204 |
| Yeo & Yeo | Saginaw, Mich. | 34.36 | 2.41 | 8 | 27 | 218 |
| ORBA | Chicago | 32.00 | 6.67 | 1 | 25 | 138 |
| Porte Brown | Elk Grove Village, Ill. | 27.21 | 2.80 | 5 | 18 | 125 |
| CapinCrouse | Greenwood, Ind. | 23.64 | 4.69 | 15 | 22 | 151 |
| Brady Ware & Co.* | Miamisburg, Ohio | 21.50 | 8.04 | 4 | 30 | 146 |
| Maner Costerisan* | Lansing, Mich. | 21.00 | 6.06 | 1 | 18 | 119 |
| Barnes, Dennig & Co. | Cincinnati | 20.79 | 5.11 | 3 | 26 | 126 |
| Wegner CPAs | Madison, Wis. | 18.30 | 8.80 | 6 | 14 | 130 |
| Hawkins Ash CPAs | La Crosse, Wis. | 17.00 | 6.18 | 9 | 16 | 129 |
| Warady & Davis | Deerfield, Ill. | 17.00 | 3.03 | 1 | 23 | 100 |
| Kutchins, Robbins & Diamond | Schaumburg, Ill. | 16.00 | 25.49 | 2 | 14 | 77 |
| Clayton & McKervey | Southfield, Mich. | 13.63 | 8.61 | 1 | 10 | 68 |
Notes:
NA Not available/applicable
NC No change
* Firm estimate