Company: RFMZ
Filing Date: 2025-05-21
Form Type: POS EX
Source: 0001398344-25-009966
Chunk: 1

Company: RiverNorth Flexible Municipal Income Fund II, Inc.
Filing Date: 2025-05-21
Form: POS EX
Chunk 1
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Rule 462(e) under the Securities Act, check the following box [ ]

If this Form is a post-effective amendment to a registration
statement filed pursuant to General Instruction B to register additional securities or additional classes of securities pursuant to Rule
413(b) under the Securities Act, check the following box [ ]

It is proposed that this filing will become effective
(check appropriate box):

| [  ] | when declared effective pursuant to section 8(c) |

If appropriate, check the following box:

| [  ] | This [post-effective] amendment designates a new effective date for a previously filed [post-effective amendment] [registration statement].                                                                                                                  |
| [  ] | This Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, and the Securities Act registration statement number of the earlier effective registration statement for the same offering is: _____. |
| [  ] | This Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, and the Securities Act registration statement number of the earlier effective registration statement for the same offering is: _____.                        |
| [X]  | This Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, and the Securities Act registration statement number of the earlier effective registration statement for the same offering is: 333-281396.                   |

Check each box that appropriately characterizes the
Registrant:

| [X]  | Registered Closed-End Fund (closed-end company that is registered under the Investment Company Act of 1940 (the “Investment Company Act”)).                           |
| [  ] | Business Development Company (closed-end company that intends or has elected to be regulated as a business development company under the Investment Company Act.      |
| [  ] | Interval Fund (Registered Closed-End Fund or a Business Development Company that makes periodic repurchase offers under Rule 23c-3 under the Investment Company Act). |
| [X]  | A.2 Qualified (qualified to register securities pursuant to General Instruction A.2 of this Form).                                                                    |
| [  ] | Well-Known Seasoned Issuer (as defined by Rule 405 under the Securities Act).                                                                                         |
| [  ] | Emerging Growth Company (as defined by Rule 12b-2 under the Securities and Exchange Act of 1934).                                                                     |

| [  ] | If an Emerging Growth Company, indicate by check mark if the registrant has elected