| Nov 3, 2023 | Citizens Bank | Sac City | $60.4M | Iowa Trust & Savings Bank |
| Nov 18, 2011 | Polk County Bank | Johnston | $91.6M | Grinnell State Bank |
| Sep 4, 2009 | Vantus Bank | Sioux City | $503.6M | Great Southern Bank |
| Jan 14, 2000 | Hartford-Carlisle SB | Carlisle | $105.0M | Citizens Bank |
| Apr 29, 1993 | Valley National Bank of Fremont | Hamburg | $7.0M | Decatur County State Ban |
| Nov 22, 1991 | Peoples FSA | Ottumwa | $34.3M | South Ottumwa SB |
| Sep 27, 1991 | Home FS & La of Harlan | Harlan | $91.4M | Conservative SB FSB |
| May 10, 1991 | First FS & La of Creston | Creston | $67.3M | First FSB of Creston |
| Apr 26, 1991 | Home FS & La, F.A. | Algona | $134.3M | Branch sale |
| Mar 22, 1991 | United FSA of Iowa | Des Moines | $895.8M | Branch sale |
| Jul 27, 1990 | Statesman Bank for Savings, FSB | Des Moines | $540.4M | Branch sale |
| Mar 16, 1990 | Sun Federal Savings Assoc. | Fort Dodge | $24.3M | Ida County State Bank |
| Feb 9, 1990 | American Federal Savings Assoc. | Des Moines | $910.7M | Branch sale |
| Jan 4, 1990 | First Central Federal Savings Bank | Chariton | $112.8M | Branch sale |
| Oct 16, 1989 | Banc Iowa Federal Savings Bank | Cedar Rapids | $161.9M | Branch sale |
| Apr 6, 1989 | Sioux Valley S & La | Cherokee | $61.8M | Deposit payout |
| Apr 6, 1989 | First FS & La of Estherville | Estherville | $60.6M | Branch sale |
| Sep 1, 1988 | Mingo Trust & Savings Bank | Mingo | $12.1M | Exchange State Bank |
| Sep 1, 1988 | Pisgah Savings Bank | Pisgah | $9.7M | Iowa Savings Bank |
| Jun 2, 1988 | Community State Bank | Whiting | $5.1M | Sloan State Bank |
| May 6, 1988 | Forest City Bank & Trust Co. | Forest City | $26.6M | Liberty Bank&trust |
| Mar 10, 1988 | Hayesville Savings Bank | Hayesville | $38.0M | Farmers Savings Bank |
| Jan 20, 1988 | Aredale State Bank | Aredale | $9.6M | First Security Bank&trus |
| Dec 3, 1987 | Climbing Hill Savings Bank | Climbing Hill | $5.4M | First Trust&savings Bank |
| Jul 30, 1987 | Farmers State Bank | Kanawha | $15.9M | First NB of Clarion |
| Apr 23, 1987 | Osceola State Bank & Trust Company | Osceola | $8.6M | American State Bank |
| Mar 4, 1987 | The First State Bank | Rockford | $15.8M | First Security Bank&trus |
| Feb 5, 1987 | State Bank of Allison | Allison | $17.4M | Lincoln Savings Bank |
| Jan 15, 1987 | Latimer Bank & Trust | Latimer | $23.2M | First NB of Clarion |
| Aug 7, 1986 | Graettinger State Bank | Graettinger | $11.8M | Swea City State Bank |
| Jul 31, 1986 | Citizens State Bank | Iowa Falls | $54.0M | Green Belt Bank&trust |
| Jul 24, 1986 | The First National Bank of Prairie City | Prairie City | $18.9M | Security Bank |
| Jun 27, 1986 | Commercial State Bank | Pocahontas | $47.9M | Citizens State Bank |
| May 29, 1986 | The Lone Rock Bank, N.A. | Lone Rock | $7.5M | Swea City State Bank |
| May 1, 1986 | The Bedford National Bank | Bedford | $19.3M | American National Bank |
| Apr 10, 1986 | The National Bank | Dyersville | $43.0M | American Trust&savings B |
| Mar 20, 1986 | Williams Savings Bank | Williams | $12.8M | Iowa Falls State Bank |
| Feb 21, 1986 | Capitol S&LA | Mount Pleasant | $192.0M | Midwest FS&LA of Minneapoli |
| Feb 14, 1986 | First National Bank of Tipton | Tipton | $17.9M | Citizens Savings Bank |
| Feb 6, 1986 | The Peoples National Bank & Trust | Albia | $52.0M | —
|
| Nov 8, 1985 | Auburn Savings Bank | Auburn | $6.8M | Carroll County State Ban |
| Nov 1, 1985 | Early Savings Bank | Early | $12.9M | Citizens 1st NB Storm La |
| Aug 6, 1985 | Mineola State Bank | Mineola | $5.2M | Glenwood State Bank |
| Jun 21, 1985 | Urbana Savings Bank | Urbana | $7.2M | Peoples Bank&trust Co |
| May 9, 1985 | Story County State Bank | Story City | $33.6M | Story County Bank&trust |
| May 3, 1985 | Farmers Savings Bank | Massena | $16.9M | Union National Bank |
| Apr 26, 1985 | Peoples State Bank | Odebolt | $13.5M | Peoples Savings Bank |
| Mar 8, 1985 | Commercial State Bank | Afton | $16.3M | Citizens Savings Bank |
| Feb 19, 1985 | Inwood State Bank | Inwood | $8.1M | Security Savings Bank |
| Feb 7, 1985 | First National Bank of Woodbine | Woodbine | $25.8M | Iowa Savings Bank |