  With ${\mathcal{Q}}_{q,n}$ the distribution of $n$ minus the rank of a matrix
chosen uniformly from the collection of all $n\times(n+m)$ matrices over the
finite field $\mathbb{F}_q$ of size $q\ge2$, and ${\mathcal{Q}}_q$ the
distributional limit of ${\mathcal{Q}}_{q,n}$ as $n\rightarrow\infty$, we apply
Stein's method to prove the total variation bound
$\frac{1}{8q^{n+m+1}}\leq\|{\mathcal{Q}}_{q,n}-{\mathcal{Q}}_q\|_{\mathrm{TV}}\leq\frac{3}{q^{n+m+1}}$.
In addition, we obtain similar sharp results for the rank distributions of
symmetric, symmetric with zero diagonal, skew symmetric, skew centrosymmetric
and Hermitian matrices.
